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Association between work from home and health-related productivity loss among Korean employees
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Original Article Association between work from home and health-related productivity loss among Korean employees
Hyo Jeong Kim1orcid, Dong Wook Lee2orcid, Jaesung Choi3orcid, Yun-Chul Hong4orcid, Mo-Yeol Kang1orcid
Annals of Occupational and Environmental Medicine 2024;36:e13.
DOI: https://doi.org/10.35371/aoem.2024.36.e13
Published online: April 30, 2024

1Department of Occupational and Environmental Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.

2Department of Occupational and Environmental Medicine, Inha University Hospital, Inha University, Incheon, Korea.

3Department of Economics, Sungkyunkwan University, Seoul, Korea.

4Department of Human Systems Medicine, Seoul National University College of Medicine, Seoul, Korea.

Correspondence: Mo-Yeol Kang. Department of Occupational and Environmental Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 06591, Korea. snaptoon@naver.com
• Received: January 24, 2024   • Revised: April 6, 2024   • Accepted: April 25, 2024

Copyright © 2024 Korean Society of Occupational & Environmental Medicine

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Background
    After the coronavirus disease 2019 pandemic, the widespread adoption of working from home, or teleworking, has prompted extensive research regarding its effects on work productivity and the physical and mental health of employees. In this context, our study aimed to investigate the association between working from home and health-related productivity loss (HRPL).
  • Methods
    An online survey was conducted with a sample of 1,078 workers. HRPL was estimated by the Work Productivity and Activity Impairment Questionnaire: General Health version. Workers that have been working from home in the last 6 months were categorized into the “work from home” group. Generalized linear models were used to compare the mean difference of HRPL between “work from home” and “commuters” group. Stratified analyses were conducted based on various factors including gender, age, income level, occupation, education level, previous diagnosis of chronic disease, presence of preschool children, living in studio apartment, living alone, commuting time, working hours and regular exercise.
  • Results
    The overall HRPL was higher in the “work from home” group than in the “commuters” group with a mean difference of 4.05 (95% confidence interval [CI]: 0.09–8.01). In the stratified analyses, significant differences were observed in workers with chronic diseases (mean difference: 8.23, 95% CI: 0.38–16.09), who do not live alone (mean difference: 4.84, 95% CI: 0.35–9.33), and workers that do not exercise regularly (mean difference: 4.96, 95% CI: 0.12–9.80).
  • Conclusions
    Working from home is associated with an increased HRPL in the Korean working population, especially among those with chronic diseases, those who do not live alone, and those who do not exercise regularly.
Following the coronavirus disease 2019 (COVID-19), the government emphasized and recommended physical distancing. Therefore, working from home, a working model in which workers do their job at home,1 has been widely implemented. According to Statistics Korea, the number of workers working from home has increased by 10 times after the pandemic, from 95,000 in August 2019 to 956,000 in August 2022.2 Working from home is also referred to as remote working, telecommuting or teleworking.
Previous research has presented the heterogeneous health outcomes of working from home. In terms of physical health, the absence of proper work equipment and environment can have a negative effect,3 while another study showed that men experienced lower level of pain when they worked from home.4 Women had a lower possibility of having improved health outcomes from working from home.5 Teleworking has been reported to have detrimental effects on mental health. Teleworkers reported greater loneliness, irritability, worry, guilt and increased mental health symptoms of stress.6 Working from home is associated with more stress, particularly among parents.7 On the other hand, some studies found that remote work was associated with a reduction of psychological and physical stress,8 and a lower prevalence of depression when the amount of teleworking is less than eight hours per month.9
Regarding work productivity, working from home was associated with decreased productivity.10 Another study demonstrated relationship between working from home and increased presenteeism.8 However, studies on health-related productivity loss (HRPL) are limited, with a significant lack of evidence focusing on Korean workers. Thus, our study aimed to examine the association between working from home and HRPL among Korean workers using the Work Productivity and Activity Impairment Questionnaire: General Health version (WPAI:GH), which measures HRPL as the sum of presenteeism and absenteeism. Furthermore, stratified analyses on various dimensions including basic demographics, occupational factors and life style, which are known to influence HRPL,11,12 were conducted to determine the subgroups that were significantly associated with working from home and HRPL.
Study participants
The target population was waged workers in Korea, aged ≥ 19 years. Data were collected in September 2021 using a web-based questionnaire through an online panel survey service (Data Spring Korea Inc., Seoul, Korea). A total of 1,078 participants completed the questionnaires. The respondents were all individuals who agreed to participate in the survey, resulting in a 100% response rate. The survey incorporated questions about basic demographic information (gender, age, education level, and marital status), health status, lifestyle and working environment including whether they worked from home.
Measurement of variables

HRPL

There are several methods for measuring HRPL, including the effect of health on presenteeism and absenteeism.13 Among them, the WPAI:GH was used in this study. The WPAI:GH consists of six questions that ask about current employment status, hours missed due to health problems (Q2), hours missed due to other reasons (Q3), hours actually worked (Q4), the degree to which health affected productivity while working (using a 0–10 numeric scale) (Q5), and the degree to which health affected productivity in regular unpaid activities (using a 0–10 numeric scale) (Q6). Absenteeism was calculated as the percentage of work time missed owing to health problems, which is Q2/(Q2+Q4) * 100. Presenteeism was calculated as the actual work time multiplied by the subjective amount of impairment while working due to health as perceived by workers, presented as a percentage, which is {1-Q2/(Q2+Q4)} * (Q5/10) * 100. The overall percentage of HRPL was calculated as the sum of absenteeism and presenteeism. The reliability and validity of the WPAI:GH have been established in prior research,14 and the Korean version was developed through independent translation, harmonization, and expert review.15

Work from home

Among the participants who answered yes to the question “Have you been working from home in the last 6 months?”, workers that worked from home more than 3 days a week were considered in the “work from home” group.

Covariates

Basic characteristics included gender, age (20–29, 30–39, 40–49, 50–59, 60 years–), education level (high school or less, college or university, and graduate school), marital status (single, married, separated, widowed, and divorced), and health status (diagnosis of chronic diseases including hypertension, diabetes, hyperlipidemia, angina or myocardial infarction, stroke or other cerebrovascular disease, major depressive disorder, anxiety disorder and cancer). We chose to use the term gender rather than sex to emphasize the sociological meaning. Monthly income was inquired and divided into four groups of equal size using quartiles.
The Korean Standard Classification of Occupations was used to survey occupations. Managers, professionals and related workers and office workers were classified as white collar; clerks, service workers and sales workers were classified as pink collar; and skilled agricultural, forestry and fishery workers, craft and related trades workers and equipment, and mechanic operating and assembling workers were classified as blue collar. Although blue-collar workers are commonly perceived to be unable to work from home, according to the report for “Guideline Development for Establishing a Healthy Telecommuting Environment” by the Korea Occupational Safety and Health Agency,16 19.2% of manufacturing workers and 3.7% of transportation workers reported working from their own home. Furthermore, based on the “Excellent Utilization Cases of Working from Home, 2022” issued by the Ministry of Employment and Labor,17 it is evident that even production workers in the manufacturing sector were able to work from home. There were some approaches such as receiving work materials at home, processing or producing products, and then sending the final products to the workplace, and adjusting equipment or facilities at home. Therefore, we decided to include blue collar workers for our study.
The question regarding working hours was asked in the form of h/week, and grouped as follows: < 40, 40 ≤ and < 52, and 52 ≤. Other lifestyle-related variables included presence of preschool children at home, living alone, living in a studio apartment (one room), commuting time, and regular exercise. Commuting time was categorized into three groups: less than 1 hour, between 1 hour and 2 hours, and more than 2 hours.
Covariates including basic demographic characteristics were selected based on previous research,11,12 and those are work-related factors such as working hours and occupational category, and individual factors such as health condition and lifestyle.
Statistical analysis
Basic demographic characteristics were analyzed using the χ2 test according to whether the participants were working from home. Generalized linear models utilizing identity function were used to compare HRPL between the two groups. The adjusted variables were gender, age, occupation, marital status, education level, income level, previous diagnosis of chronic disease, working hours, commuting time and living alone. Stratified analyses were conducted according to gender, age, income level, occupation, education level, previous diagnosis of chronic disease, presence of preschool children, living in studio apartments, living alone, commuting time, working hours and regular exercise. All statistical analyses were performed using SAS (version 9.4; SAS Institute, Cary, NC, USA), and p values < 0.05 were considered significant.
Ethics statement
This study was approved by the Institutional Review Board of the Seoul National University College of Medicine (C2107-253-1242).
We recruited 536 workers that worked from home and 542 workers that commuted. The basic characteristics of the 1,078 participants including 506 men (46.9%) and 572 women (53.1%) are shown in Table 1. Of these, 536 (49.7%) were working from home and 542 (50.3%) were not. More women (58.0%) worked from home than men (42.0%). The majority of the workers who worked from home were aged 30–39 years (49.8%), graduated from college or university (75.7%), were white collar (89.4%), and worked 40–52 hours a week (70.1%). There were no significant differences in income levels, marital statuses or health statuses.
Table 1

Baseline characteristics according to work from home

Variables Total Work from home p-value
Yes No
Overall 1,078 (100) 536 (49.7) 542 (50.3)
Gender 0.005
Men 506 (46.9) 225 (42.0) 281 (51.8)
Women 572 (53.1) 311 (58.0) 261 (48.2)
Age (years) < 0.001
20–29 200 (18.6) 93 (17.4) 107 (19.7)
30–39 455 (42.2) 267 (49.8) 188 (34.7)
40–49 283 (26.3) 120 (22.4) 163 (30.1)
50– 140 (13.0) 56 (10.4) 84 (15.5)
Education level < 0.001
≤ High school 110 (10.2) 38 (7.1) 72 (13.3)
College or university 819 (76.0) 406 (75.7) 413 (76.2)
Graduate school 149 (13.8) 92 (17.2) 57 (10.5)
Income level (quartile) 0.926
1st quartile 260 (24.1) 130 (24.3) 130 (24.0)
2nd quartile 278 (25.8) 129 (24.1) 149 (27.5)
3rd quartile 254 (23.6) 128 (23.9) 126 (23.2)
4th quartile 286 (26.5) 149 (27.8) 137 (25.3)
Occupation < 0.001
Blue collar 100 (9.3) 21 (3.9) 79 (14.6)
White collar 851 (78.9) 479 (89.4) 372 (68.6)
Pink collar 127 (11.8) 36 (6.7) 91 (16.8)
Marital status 0.694
Single 543 (50.4) 280 (52.2) 263 (48.5)
Married 492 (45.6) 230 (42.9) 262 (48.3)
Separated 15 (1.4) 10 (1.9) 5 (0.9)
Widowed 1 (0.1) 1 (0.2) 0 (0)
Divorced 27 (2.5) 15 (2.8) 12 (2.2)
Previous diagnosis with chronic disease 0.993
Yes 304 (28.2) 152 (28.4) 152 (28.0)
No 774 (71.8) 384 (71.6) 390 (72.0)
Working hours (hours/week) < 0.001
< 40 131 (12.2) 91 (17.0) 40 (7.4)
40 ≤ and < 52 770 (71.4) 376 (70.1) 394 (72.7)
52 ≤ 177 (16.4) 69 (12.9) 108 (19.9)
Values are presented as number of participants (%).
The p-values are determined by the χ2 test.
The mean HRPL of the participants was 42.00 (Table 2). The mean HRPL of the workers that worked from home was 44.18 and that of commuters was 39.83 (p = 0.045). Statistically significant differences were observed based on age (p = 0.007), occupation (p = 0.036), previous diagnosis with chronic disease (p < 0.0001), and working hours (p = 0.029).
Table 2

Mean HRPL according to work from home (%)

Variables Total Work from home p-value
Yes No
Overall 42.00 44.18 39.83 0.045
Gender 0.118
Men 40.66 43.40 38.48
Women 43.17 44.75 41.28
Age (years) 0.007
20–29 42.42 44.36 40.76
30–39 42.89 44.07 41.22
40–49 44.11 47.97 41.29
50– 34.12 36.39 32.56
Education level 0.746
≤ High school 40.11 45.18 37.39
College or university 41.95 43.39 40.53
Graduate school 43.64 47.22 37.85
Income level (quartile) 0.891
1st quartile 42.15 43.85 40.47
2nd quartile 42.43 44.78 40.36
3rd quartile 42.56 46.22 38.89
4th quartile 40.94 42.25 39.52
Occupation 0.036
Blue collar 36.76 46.93 33.99
White collar 41.85 43.55 39.65
Pink collar 47.08 51.31 45.50
Marital status 0.411
Single 43.09 44.92 41.12
Married 40.84 43.56 38.44
Separated/Widowed/Divorced 41.46 41.72 41.06
Previous diagnosis with chronic disease < 0.0001
Yes 49.29 55.39 43.19
No 39.13 39.74 38.52
Working hours (hours/week) 0.029
< 40 42.82 45.00 37.92
40 ≤ and < 52 40.76 42.18 39.40
52 ≤ 46.74 54.13 42.09
The p-values are determined by the generalized linear model.
Adjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.
Table 3 shows the mean differences in HRPL between the two groups: (work from home) - (commuters). The results were presented as percentage and were adjusted for gender, age, occupation, marital status, education level, income level, previous diagnosis of chronic disease, working hours, commuting time and living alone. The mean difference of presenteeism and absenteeism were not statistically significant. In terms of overall HRPL, the mean difference was 4.05 (95% confidence interval [CI]: 0.09–8.01).
Table 3

Mean differences (least square means) of health-related productivity loss according to work from home (95% confidence interval)

Work at home Crude model Adjusted modela
Absenteeism 2.05 (−0.03, 4.12) 2.11 (−0.05, 4.28)
Presenteeism 2.30 (−1.07, 5.67) 1.93 (−1.65, 5.52)
HRPL 4.35 (0.58, 8.12) 4.05 (0.09, 8.01)
Values are presented as % (95% confidence interval). Fonts in bold indicate statistically significant values.
HRPL: health-related productivity loss.
aAdjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.
The results of the stratified analyses are presented in Table 4. The mean difference in absenteeism of workers who live with others was 2.54 (95% CI: 0.17–4.91). There were no significant differences in presenteeism in the stratified analyses. The overall HRPL was significantly different in the three subgroups: workers with chronic diseases (mean difference: 8.23, 95% CI: 0.38–16.09), workers living with others (mean difference: 4.84, 95% CI: 0.35–9.33), and workers that do not exercise regularly (mean difference: 4.96, 95% CI: 0.12–9.80). Mean differences in absenteeism, presenteeism and HRPL increased with age. The results of the stratified analyses are presented in Supplementary Fig. 1 as bar graphs.
Table 4

Stratified analyses of mean differences (least square means) of health-related productivity loss according to work from home (95% confidence interval)

Work at home Absenteeism Presenteeism HRPL
Gender
Men 2.98 (−0.07, 6.02) 0.74 (−4.70, 6.18) 3.72 (−2.32, 9.76)
Women 0.88 (−2.23, 3.99) 2.73 (−2.15, 7.62) 3.52 (−1.74, 8.97)
Age (years)
20–29 −0.64 (−6.59, 5.32) −0.81 (−9.07, 8.08) −1.45 (−10.95, 8.05)
30–39 2.42 (−0.75, 5.59) 1.66 (−3.86, 7.19) 4.08 (−1.84, 9.99)
40–49 2.73 (−2.00, 7.47) 3.16 (−4.07, 10.39) 5.90 (−2.35, 14.14)
50– 4.47 (−0.86, 9.80) 6.04 (−5.79, 17.87) 10.50 (−2.43, 23.44)
Income level
1st quartile 2.27 (−2.29, 6.84) −0.62 (−8.12, 6.87) 1.65 (−6.55, 9.85)
2nd quartile 1.89 (−2.71, 6.49) 2.08 (−5.63, 9.80) 3.97 (−4.42, 12.37)
3rd quartile 1.33 (−2.47, 5.13) 6.20 (−1.60, 14.00) 7.53 (−0.92, 15.98)
4th quartile 3.16 (−1.43, 7.75) 1.89 (−5.00, 8.78) 5.05 (−2.86, 12.97)
Occupation
Blue collar −1.33 (−10.83, 8.17) 9.60 (−7.25, 26.45) 8.27 (−10.22, 26.77)
White collar 1.91 (−0.28, 4.09) 1.81 (−2.03, 5.64) 3.71 (−0.51, 7.94)
Pink collar 8.45 (−2.67, 19.56) −5.21 (−19.40, 8.98) 3.23 (−12.51, 18.98)
Education level
≤ High school 3.36 (−4.38, 11.09) 5.54 (−7.62, 18.69) 8.89 (−5.89, 23.68)
College or university 1.75 (−0.77, 4.26) 0.24 (−3.89, 4.36) 1.98 (−2.56, 6.53)
Graduate school 3.25 (−2.55, 9.05) 5.10 (−4.56, 14.75) 8.35 (−2.49, 19.18)
Previous diagnosis with chronic disease
Yes 3.15 (−2.68, 8.98) 5.09 (−2.11, 12.29) 8.23 (0.38, 16.09)
No 1.05 (−1.05, 3.15) 0.40 (−3.81, 4.60) 1.45 (−3.19, 6.09)
Presence of preschool child
Yes 1.72 (−0.70, 4.13) 2.41 (−1.76, 6.57) 4.13 (−0.39, 8.64)
No 3.91 (−0.85, 8.66) 1.25 (−6.19, 8.69) 5.15 (−3.46, 13.77)
Living in studio apartment (One room)
Yes 1.51 (−6.87, 9.88) −0.31 (−11.13, 10.50) 1.19 (−10.78, 13.17)
No 1.61 (−0.56, 3.77) 2.38 (−1.48, 6.24) 3.99 (−0.26, 8.24)
Living alone
Yes −0.54 (−5.90, 4.81) 0.28 (−7.81, 8.38) −0.26 (−9.13, 8.61)
No 2.54 (0.17, 4.91) 2.30 (−1.76, 6.36) 4.84 (0.35, 9.33)
Commuting time (hours)
< 1 1.54 (−2.14, 5.22) 1.27 (−4.13, 6.68) 2.81 (−3.26, 8.89)
1 ≤ and < 2 2.40 (−0.82, 5.62) 3.58 (−2.14, 9.31) 5.99 (−0.30, 12.27)
2 ≤ 2.68 (−1.93, 7.28) −2.16 (−11.57, 7.24) 0.51 (−9.52, 10.55)
Working hours
< 40 6.73 (−3.32, 16.79) 2.05 (−9.36, 13.46) 8.78 (−4.97, 22.53)
40 ≤ and < 52 1.12 (−1.10, 3.33) 2.34 (−1.89, 6.57) 3.46 (−1.14, 8.06)
52 ≤ 3.03 (−3.79, 9.85) 4.79 (−4.52, 14.11) 7.82 (−2.50, 18.15)
Regular exercise of high intensity
Yes 2.65 (−1.55, 6.84) −1.44 (−7.74, 4.85) 1.20 (−5.88, 8.29)
No 1.43 (−1.09, 3.96) 3.53 (−0.94, 8.00) 4.96 (0.12, 9.80)
Values are presented as % (95% confidence interval). Fonts in bold indicate statistically significant values.
Adjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.
HRPL: health-related productivity loss.
This study explored the association between working from home and HRPL. Workers who work from home experience a 4% point higher HRPL than those who do not work from home. In the stratified analyses, the “work from home” group had a significantly higher HRPL than the “commuters” group among workers with chronic diseases, workers who did not live alone, and workers who did not engage in physical activity regularly. Although prior studies are not abundant and the results are inconsistent, it is more evident that there is a negative association between working from home and health or productivity18 and it is supported by the results of our study.
Some possible factors of working from home can result in a higher HRPL. The first is the lack of boundary between work and family or other private lives. Increased time spent at home can escalate family-work conflicts and lead to less productivity and more stress.19 Women experience more conflict than men, indicating a higher burden of housework and caregiving.20 A previous study has suggested that work-to-family conflict negatively affects work-related wellbeing, including emotional exhaustion and burnout.21 In addition, longer hours of working home were associated with role ambiguity, role conflicts and work-private life conflict.22 Elevated occupational stress owing to this conflict may be associated with increased HRPL.23 The results of our study, which observed a higher mean difference in HRPL among workers who did not live alone, are consistent with these previous findings. Workers who live alone face fewer barriers when working at home. However, workers with cohabitants can be interrupted by their families, especially those who require caregiving.
Another approach involves ergonomics. A prospective cohort study showed that lack of space for concentration, lack of sufficient light and foot space, and inadequate temperature and humidity impaired work function.24 Working from home, which is not specifically designed for work, leads to lower workstation ergonomic suitability, and to musculoskeletal symptoms.25 This was especially true for those who started working from home after the COVID-19 pandemic and did not have a fully prepared environment.
Third, working from home can lead to social isolation and increase work-related stress.19 The longer a person works from home, contact with colleagues naturally decreases and there is less social support from colleagues.22 This can result in various negative work outcomes, including increased burnout21 and stress due to psychological detachment.25
Working from home could abruptly change workers’ lifestyles by interfering with their daily routines. Workers who worked from home had a significantly higher risk of sleep disturbance26 and impaired sleep quality.27 In addition, teleworkers reported increased alcohol consumption,28 especially if they preferred to commute daily.29 These changes are explicit factors that can negatively affect both physical and mental health, and might have led to a higher prevalence of depression and anxiety among teleworkers.27
In the stratified analyses, workers with chronic diseases who did not exercise regularly had significantly higher mean differences in HRPL when working from home. A Japanese study proposed that people working from home had higher sedentary time and lacked physical activity during work, both light intensity and moderate-to-vigorous.30 This might be explained by the reduction in commuting, however, research on physical activity during daily trips on transportation can refute. Although non-commuting trips were greater among teleworkers, the total amount of physical activity on daily trips was less than that of non-teleworkers before, during and after COVID-19.31 This indicates that teleworkers must engage in extra physical activity to replace the amount ensured by commuting trips. Working from home is not only associated with decreased physical activity during worktime but also with decreased physical activity overall.32 This decline in physical activity is more harmful to people who do not exercise voluntarily. Additionally, an increase in sedentary time can aggravate chronic diseases.33 It has also been stated that sudden workstyle changes due to COVID-19 and teleworking are associated with loss of health consciousness, which means that people care less about their chronic condition.31
It was also noted that the difference in HRPL owing to teleworking was higher in the older age group. One study demonstrated that older age is associated with lower job performance when teleworking.34 This might indicate that older workers struggle more adapt to working from home, which can lead to a higher HRPL. In fact, older workers felt more discontent when working from home. In a survey evaluating work efficiency, older employees were likely to highlight disadvantages,35 and they perceived themselves as being less competent in technological aspect.36 The experience of frustration due to low professional self-efficacy can lead to higher level of work stress and exhaustion.37
This study is the first in Korea to investigate the relationship between working from home and HRPL, and our overall findings are consistent with those of earlier studies from other countries. One of the limitations of our study was that it was cross-sectional, thus no causal relationships could be established. Furthermore, it should be considered that a significant number of workers started working from home because of the physical distancing policy implemented after COVID-19. Workers who were teleworking before the pandemic and had more autonomy to choose where to work, were less likely to report the disadvantages of working from home.38 Owing to a lack of information, our study cannot shed lights on the difference between voluntary and non-voluntary teleworkers; therefore, further research is needed.
Our study suggests that working from home is associated with a high HRPL and the difference is greater in workers with chronic diseases, those living with others, and those who do not exercise regularly. We also found that older teleworkers exhibited greater differences in HRPL. As working from home has widely expanded in many workplaces even after the pandemic, it is important to pay attention to the health and HRPL of teleworkers. Employers should be careful not to compromise teleworkers’ health outcome, by securing a proper home environment or promoting communication. Workers may have to maintain a separate workspace at home, to divide work from private life, especially if they have cohabitants. Workers with old age, chronic diseases and lack of physical activity, who are the more vulnerable group, should be more mindful of their health and lifestyles.

Funding: This research is supported by National Research Foundation of Korea (NRF-2022R1F1A1066498).

Competing interests: The authors declare that they have no competing interests.

Author Contributions:

  • Conceptualization: Kang MY.

  • Data curation: Lee DW, Hong YC.

  • Formal analysis: Kim HJ.

  • Validation: Kang MY.

  • Visualization: Kim HJ.

  • Writing - original draft: Kim HJ.

  • Writing - review & editing: Lee DW, Choi J, Kang MY.

CI

confidence interval

COVID-19

coronavirus disease 2019

HRPL

health-related productivity loss

WPAI:GH

Work Productivity and Activity Impairment Questionnaire: General Health version

Supplementary Fig. 1

Stratified analyses of mean differences of health-related productivity loss according to work from home. Absenteeism and presenteeism (%) are presented as bars. 95% confidential intervals are presented as black lines. Adjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.
aoem-36-e13-s001.ppt
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        Association between work from home and health-related productivity loss among Korean employees
        Ann Occup Environ Med. 2024;36:e13  Published online April 30, 2024
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      Association between work from home and health-related productivity loss among Korean employees
      Association between work from home and health-related productivity loss among Korean employees
      VariablesTotalWork from homep-value
      YesNo
      Overall1,078 (100)536 (49.7)542 (50.3)
      Gender0.005
      Men506 (46.9)225 (42.0)281 (51.8)
      Women572 (53.1)311 (58.0)261 (48.2)
      Age (years)< 0.001
      20–29200 (18.6)93 (17.4)107 (19.7)
      30–39455 (42.2)267 (49.8)188 (34.7)
      40–49283 (26.3)120 (22.4)163 (30.1)
      50–140 (13.0)56 (10.4)84 (15.5)
      Education level< 0.001
      ≤ High school110 (10.2)38 (7.1)72 (13.3)
      College or university819 (76.0)406 (75.7)413 (76.2)
      Graduate school149 (13.8)92 (17.2)57 (10.5)
      Income level (quartile)0.926
      1st quartile260 (24.1)130 (24.3)130 (24.0)
      2nd quartile278 (25.8)129 (24.1)149 (27.5)
      3rd quartile254 (23.6)128 (23.9)126 (23.2)
      4th quartile286 (26.5)149 (27.8)137 (25.3)
      Occupation< 0.001
      Blue collar100 (9.3)21 (3.9)79 (14.6)
      White collar851 (78.9)479 (89.4)372 (68.6)
      Pink collar127 (11.8)36 (6.7)91 (16.8)
      Marital status0.694
      Single543 (50.4)280 (52.2)263 (48.5)
      Married492 (45.6)230 (42.9)262 (48.3)
      Separated15 (1.4)10 (1.9)5 (0.9)
      Widowed1 (0.1)1 (0.2)0 (0)
      Divorced27 (2.5)15 (2.8)12 (2.2)
      Previous diagnosis with chronic disease0.993
      Yes304 (28.2)152 (28.4)152 (28.0)
      No774 (71.8)384 (71.6)390 (72.0)
      Working hours (hours/week)< 0.001
      < 40131 (12.2)91 (17.0)40 (7.4)
      40 ≤ and < 52770 (71.4)376 (70.1)394 (72.7)
      52 ≤177 (16.4)69 (12.9)108 (19.9)
      VariablesTotalWork from homep-value
      YesNo
      Overall42.0044.1839.830.045
      Gender0.118
      Men40.6643.4038.48
      Women43.1744.7541.28
      Age (years)0.007
      20–2942.4244.3640.76
      30–3942.8944.0741.22
      40–4944.1147.9741.29
      50–34.1236.3932.56
      Education level0.746
      ≤ High school40.1145.1837.39
      College or university41.9543.3940.53
      Graduate school43.6447.2237.85
      Income level (quartile)0.891
      1st quartile42.1543.8540.47
      2nd quartile42.4344.7840.36
      3rd quartile42.5646.2238.89
      4th quartile40.9442.2539.52
      Occupation0.036
      Blue collar36.7646.9333.99
      White collar41.8543.5539.65
      Pink collar47.0851.3145.50
      Marital status0.411
      Single43.0944.9241.12
      Married40.8443.5638.44
      Separated/Widowed/Divorced41.4641.7241.06
      Previous diagnosis with chronic disease< 0.0001
      Yes49.2955.3943.19
      No39.1339.7438.52
      Working hours (hours/week)0.029
      < 4042.8245.0037.92
      40 ≤ and < 5240.7642.1839.40
      52 ≤46.7454.1342.09
      Work at homeCrude modelAdjusted modela
      Absenteeism2.05 (−0.03, 4.12)2.11 (−0.05, 4.28)
      Presenteeism2.30 (−1.07, 5.67)1.93 (−1.65, 5.52)
      HRPL 4.35 (0.58, 8.12) 4.05 (0.09, 8.01)
      Work at homeAbsenteeismPresenteeismHRPL
      Gender
      Men2.98 (−0.07, 6.02)0.74 (−4.70, 6.18)3.72 (−2.32, 9.76)
      Women0.88 (−2.23, 3.99)2.73 (−2.15, 7.62)3.52 (−1.74, 8.97)
      Age (years)
      20–29−0.64 (−6.59, 5.32)−0.81 (−9.07, 8.08)−1.45 (−10.95, 8.05)
      30–392.42 (−0.75, 5.59)1.66 (−3.86, 7.19)4.08 (−1.84, 9.99)
      40–492.73 (−2.00, 7.47)3.16 (−4.07, 10.39)5.90 (−2.35, 14.14)
      50–4.47 (−0.86, 9.80)6.04 (−5.79, 17.87)10.50 (−2.43, 23.44)
      Income level
      1st quartile2.27 (−2.29, 6.84)−0.62 (−8.12, 6.87)1.65 (−6.55, 9.85)
      2nd quartile1.89 (−2.71, 6.49)2.08 (−5.63, 9.80)3.97 (−4.42, 12.37)
      3rd quartile1.33 (−2.47, 5.13)6.20 (−1.60, 14.00)7.53 (−0.92, 15.98)
      4th quartile3.16 (−1.43, 7.75)1.89 (−5.00, 8.78)5.05 (−2.86, 12.97)
      Occupation
      Blue collar−1.33 (−10.83, 8.17)9.60 (−7.25, 26.45)8.27 (−10.22, 26.77)
      White collar1.91 (−0.28, 4.09)1.81 (−2.03, 5.64)3.71 (−0.51, 7.94)
      Pink collar8.45 (−2.67, 19.56)−5.21 (−19.40, 8.98)3.23 (−12.51, 18.98)
      Education level
      ≤ High school3.36 (−4.38, 11.09)5.54 (−7.62, 18.69)8.89 (−5.89, 23.68)
      College or university1.75 (−0.77, 4.26)0.24 (−3.89, 4.36)1.98 (−2.56, 6.53)
      Graduate school3.25 (−2.55, 9.05)5.10 (−4.56, 14.75)8.35 (−2.49, 19.18)
      Previous diagnosis with chronic disease
      Yes3.15 (−2.68, 8.98)5.09 (−2.11, 12.29) 8.23 (0.38, 16.09)
      No1.05 (−1.05, 3.15)0.40 (−3.81, 4.60)1.45 (−3.19, 6.09)
      Presence of preschool child
      Yes1.72 (−0.70, 4.13)2.41 (−1.76, 6.57)4.13 (−0.39, 8.64)
      No3.91 (−0.85, 8.66)1.25 (−6.19, 8.69)5.15 (−3.46, 13.77)
      Living in studio apartment (One room)
      Yes1.51 (−6.87, 9.88)−0.31 (−11.13, 10.50)1.19 (−10.78, 13.17)
      No1.61 (−0.56, 3.77)2.38 (−1.48, 6.24)3.99 (−0.26, 8.24)
      Living alone
      Yes−0.54 (−5.90, 4.81)0.28 (−7.81, 8.38)−0.26 (−9.13, 8.61)
      No 2.54 (0.17, 4.91) 2.30 (−1.76, 6.36) 4.84 (0.35, 9.33)
      Commuting time (hours)
      < 11.54 (−2.14, 5.22)1.27 (−4.13, 6.68)2.81 (−3.26, 8.89)
      1 ≤ and < 22.40 (−0.82, 5.62)3.58 (−2.14, 9.31)5.99 (−0.30, 12.27)
      2 ≤2.68 (−1.93, 7.28)−2.16 (−11.57, 7.24)0.51 (−9.52, 10.55)
      Working hours
      < 406.73 (−3.32, 16.79)2.05 (−9.36, 13.46)8.78 (−4.97, 22.53)
      40 ≤ and < 521.12 (−1.10, 3.33)2.34 (−1.89, 6.57)3.46 (−1.14, 8.06)
      52 ≤3.03 (−3.79, 9.85)4.79 (−4.52, 14.11)7.82 (−2.50, 18.15)
      Regular exercise of high intensity
      Yes2.65 (−1.55, 6.84)−1.44 (−7.74, 4.85)1.20 (−5.88, 8.29)
      No1.43 (−1.09, 3.96)3.53 (−0.94, 8.00) 4.96 (0.12, 9.80)
      Table 1 Baseline characteristics according to work from home

      Values are presented as number of participants (%).

      The p-values are determined by the χ2 test.

      Table 2 Mean HRPL according to work from home (%)

      The p-values are determined by the generalized linear model.

      Adjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.

      Table 3 Mean differences (least square means) of health-related productivity loss according to work from home (95% confidence interval)

      Values are presented as % (95% confidence interval). Fonts in bold indicate statistically significant values.

      HRPL: health-related productivity loss.

      aAdjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.

      Table 4 Stratified analyses of mean differences (least square means) of health-related productivity loss according to work from home (95% confidence interval)

      Values are presented as % (95% confidence interval). Fonts in bold indicate statistically significant values.

      Adjusted by gender, age, occupation, marital status, education level, income level, previous diagnosis with chronic disease, working hours, commuting time and living alone.

      HRPL: health-related productivity loss.


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