Volume 26, Number 1—January 2020
CME ACTIVITY - Research
Paid Leave and Access to Telework as Work Attendance Determinants during Acute Respiratory Illness, United States, 2017–2018
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Article Metrics
Faruque Ahmed1
, Sara Kim, Mary Patricia Nowalk, Jennifer P. King, Jeffrey J. VanWormer, Manjusha Gaglani, Richard K. Zimmerman, Todd Bear, Michael L. Jackson, Lisa A. Jackson, Emily Martin, Caroline Cheng, Brendan Flannery, Jessie R. Chung, and Amra Uzicanin
, Sara Kim, Mary Patricia Nowalk, Jennifer P. King, Jeffrey J. VanWormer, Manjusha Gaglani, Richard K. Zimmerman, Todd Bear, Michael L. Jackson, Lisa A. Jackson, Emily Martin, Caroline Cheng, Brendan Flannery, Jessie R. Chung, and Amra UzicaninIntroduction
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Release date: December 18, 2019; Expiration date: December 18, 2020
Learning Objectives
Upon completion of this activity, participants will be able to:
• Describe work attendance during acute respiratory illness (ARI) and associated characteristics among workers ages 19 to 64 years with medically attended ARI or influenza during the 2017–2018 influenza season, according to a survey study
• Identify determinants of work attendance during the first 3 days after ARI onset among workers ages 19 to 64 years with medically attended ARI or influenza during the 2017–2018 influenza season, according to a survey study
• Determine clinical implications of work attendance during the first 3 days after ARI onset among workers ages 19 to 64 years with medically attended ARI or influenza during the 2017–2018 influenza season, according to a survey study
CME Editor
Deborah Wenger, MBA, Copyeditor, Emerging Infectious Diseases. Disclosure: Deborah Wenger, MBA, has disclosed no relevant financial relationships.
CME Author
Laurie Barclay, MD, freelance writer and reviewer, Medscape, LLC. Disclosure: Laurie Barclay, MD, has disclosed no relevant financial relationships.
Authors
Disclosure: Faruque Ahmed, PhD; Sara S. Kim, MPH; Jennifer King, MPH; Jeffrey J. VanWormer, PhD; Manjusha Gaglani, MBBS; Richard K. Zimmerman, MD, MPH; Todd M. Bear, PhD; Michael Jackson, PhD; Caroline Cheng, MS; Brendan Flannery, PhD; Jessie R. Chung, MPH; and Amra Uzicanin, MD, MPH, have disclosed no relevant financial relationships. Mary Patricia Nowalk, PhD, has disclosed the following relevant financial relationships: received grants for clinical research from Merck & Co., Inc. Lisa A. Jackson, MD, MPH, has disclosed the following relevant financial relationships: received grants for clinical research from Pfizer Inc. Emily Martin, MPH, PhD, has disclosed the following relevant financial relationships: served as an advisor or consultant for Pfizer Inc.
Abstract
We assessed determinants of work attendance during the first 3 days after onset of acute respiratory illness (ARI) among workers 19–64 years of age who had medically attended ARI or influenza during the 2017–2018 influenza season. The total number of days worked included days worked at the usual workplace and days teleworked. Access to paid leave was associated with fewer days worked overall and at the usual workplace during illness. Participants who indicated that employees were discouraged from coming to work with influenza-like symptoms were less likely to attend their usual workplace. Compared with workers without a telework option, those with telework access worked more days during illness overall, but there was no difference in days worked at the usual workplace. Both paid leave benefits and business practices that actively encourage employees to stay home while sick are necessary to reduce the transmission of ARI and influenza in workplaces.
The annual economic burden of influenza in the United States, depending on the severity of the influenza season, ranges from $15 billion to $64 billion, of which lost productivity accounts for a substantial proportion (1). The annual economic burden of noninfluenza viral respiratory tract infections is estimated to be $40 billion (2). As a result of absenteeism and diminished work capacity, employees with medically attended influenza can expect to lose 69% of their usual workplace productivity and employees with noninfluenza acute respiratory illness (ARI) can expect to lose 58% of their usual workplace productivity during the week after symptom onset (3). With about two thirds of the US adult population participating in the labor force (4), workplace contacts can play a major role in the transmission of influenza (5). Influenza vaccination can reduce illness and work absenteeism associated with influenza (6), but fewer than one third of US adults 18–64 years of age were vaccinated in the 2017–2018 influenza season (7).
Respiratory etiquette, regular hand hygiene, and staying home for >24 hours after fever subsides can help slow the spread of seasonal and pandemic influenza (8). For employed adults, staying home when ill usually entails taking sick days or working from home. During a respiratory illness, some employees may have a telework option, whereby they are permitted to perform their usual work functions while staying at home (without having to use paid time off or sick leave benefits). Telework may be a good mitigation strategy during an influenza pandemic if ill persons work remotely and avoid exposing co-workers during the contagious period (9). About 24% of employed persons in the United States telework regularly, varying from 8% in production occupations to 34% in managerial and professional occupations (10). Teleworking options also tend to track closely with education; 13% of workers with less than a high school diploma report being able to telework, compared with 37% of those with a bachelor’s degree or higher (10).
Approximately 74% of US civilian workers receive paid sick leave and 75% receive paid vacation leave benefits (11). However, the effect of access to telework and paid leave benefits on staying away from the workplace during influenza illness is largely unknown (5). This study assessed the association between access to telework and paid leave benefits and short-term work attendance in employed adults during a medically attended ARI or influenza episode.
Study Population
Study enrollees were patients seeking care for an ARI with cough within 7 days of illness onset during November 1, 2017–April 19, 2018 (the 2017–18 influenza season), at outpatient facilities affiliated with sites participating in the US Influenza Vaccine Effectiveness Network. The sites are in Ann Arbor and Detroit, Michigan; Pittsburgh, Pennsylvania; Temple, Texas; Seattle, Washington; and Marshfield, Wisconsin, USA. The study methods have been published previously (12,13). The institutional review boards at the sites approved the study. Study participants provided informed consent.
Data Collection
Data collected at the enrollment visit included sex, race/ethnicity, education, general health before illness, number of children <12 years of age living in household, date of illness onset, and symptoms (fever/feverishness, sore throat) (Appendix Table 1). Data extracted from electronic medical records included age, medical conditions associated with increased risk of influenza complications (based on medical encounters associated with International Classification of Diseases codes in the year before enrollment) (12), and influenza vaccination. Nasal and oropharyngeal swab specimens were collected at the enrollment visit; all persons were tested for influenza viruses using real-time reverse transcription PCR (rRT-PCR).
Adults 19–64 years of age were asked to complete a survey 7–14 days after enrollment. The follow-up survey for the 2017–18 influenza season included questions about the following: hours expected to work in a typical week, hours usually worked from home (telework, telecommute, or remote work), receipt of any paid leave that could be used for an illness (e.g., sick leave, personal time off, vacation leave), whether they worked the day before illness, and work attendance during the first 3 days of illness (including number of days worked at the usual workplace and number of days worked from home) (Appendix Table 1). Participants were also asked about recovery from illness, return to normal activities (e.g., work, exercise, housework/chores), type of employee, type of position, and number of employees in the company/organization. Workers were asked to rate their level of agreement with 3 statements about their place of work using a Likert scale (Appendix Table 1). Responses were dichotomized as “agree” or “not agree”; “strongly agree” and “agree” responses were categorized as “agree.”
Definitions
Study participants who reported that they regularly worked from home >1 hour in a typical week were classified as having access to telework (habitual teleworkers). Because persons who worked from home for only a few hours a week may not telework >1 full day a week, we performed an analysis based on the hours teleworked (none, <8 hours, or >8 hours) to assess the robustness of the findings (14). Persons who reported that they received any paid leave that could be used for an illness (e.g., paid sick leave, vacation leave, or personal time off) were classified as having paid leave benefit (15). Part-time workers were those working >20 but <35 hours; full-time was defined as >35 hours/week (10). We computed the total number of days worked in the first 3 days of illness by summing the number of days worked at the usual workplace and the number of days worked from home. We defined laboratory-confirmed influenza as a positive rRT-PCR test for influenza A or B from a nasal or oropharyngeal swab specimen.
Inclusion and Exclusion Criteria
Figure. Total enrolled and number of persons included in analyses of work attendance during the first 3 days of acute respiratory illness or influenza, United States, 2017–18 influenza season. *Valid responses are...
If an adult 19–64 years of age enrolled in the study >2 times because of multiple episodes of ARI during the influenza season, we included the first enrollment (Figure). Participants who completed the follow-up survey >14 days after enrollment were excluded to minimize recall bias (16). Participants were also excluded if they were unemployed, self-employed, owned their own business, worked solely from home, or were employed <20 hours/week. Only responses that added up to 3 days for the question on work attendance during the first 3 days of illness were considered valid and used for the final analysis. Examples of valid and invalid responses are provided in Appendix Table 2.
Statistical Analysis
We computed the median days to return to normal activities and the median days to recovery from illness using the Kaplan-Meier method to take into account that a substantial proportion of participants had not returned to normal activities (13%) or recovered from their illness (32%) at the time of follow-up. We used a χ2 test to assess differences between categories, Student t-test for means, and Wilcoxon rank-sum tests to assess differences between medians. We ran zero-inflated Poisson regression, which accounts for excess zeroes, using PROC GENMOD in SAS version 9.4 (SAS Institute, ) to compute ratios of days worked adjusted for potential confounding variables (17). The dependent variable in the regression models was the number of days worked during the first 3 days of illness (i.e., 0, 1, 2, or 3 days). In addition to running models using the total days worked during the first 3 days of illness, an indicator of productivity, as the dependent variable, we ran models using days worked at the usual workplace during the first 3 days of illness, a measure of the potential for virus transmission to co-workers, as the dependent variable. The exposure variables were access to telework (0 = no, 1 = yes) and access to paid leave (0 = no, 1 = yes). We used a forward selection process. Because age, sex, and socioeconomic status have been identified as confounders (18), we retained age, sex, and education (proxy for socioeconomic status) in the models. Statistical significance was set at α = 0.05 (2-tailed).
A total of 4,300 adults 19–64 years of age were enrolled across the study sites. Overall, 2,862 (67%) adults completed the follow-up survey within 14 days of enrollment (Figure), and 2,008 workers met the employment criteria. Of these, 1,374 (68%) had valid responses for the question on work attendance during the first 3 days of illness and were included in the analysis. The proportion of adults with valid responses was 85% (757/894) for the Washington and Wisconsin sites and 55% (617/1,114) for the other 3 sites. The proportion with valid responses was higher for non-Hispanic whites and other races compared with non-Hispanic blacks and Hispanics (71% vs. 54%; p<0.001) and for hourly workers compared with non–hourly workers (71% vs. 66%; p<0.05). Valid responses were also higher for persons who received influenza vaccination (72% vs. 65%; p<0.01) and those with paid leave benefits (70% vs. 64%; p<0.05). The proportion with valid responses did not differ by age, sex, education, access to telework, and other variables (data not shown).
Among the 1,374 adults with valid responses, the median age was 42 years, 64% were female, and 82% were non-Hispanic white. The median hours expected to work in a typical week was 40 (5th, 95th percentile: 25, 52). Thirty-six percent of participants had laboratory-confirmed influenza; patients with influenza were more likely to report fever (84%) than patients who tested negative for influenza (53%) (p<0.001), whereas the proportions reporting sore throat were similar (77% vs. 81%). In accordance with the criteria for enrollment in the study, all participants’ symptoms included cough.
The median time from illness onset to enrollment was 3 days (5th, 95th percentile: 1, 7), and the median interval from enrollment to follow-up was 7 days (5th, 95th percentile: 6, 12). Based on the Kaplan-Meier method, the median interval from illness onset to return to normal activities was 7 days, and the median interval from illness onset to recovery from illness was 11 days. During the first 3 days of illness, 539 (39%) reported that they did not work at all. The mean number of total days worked during the first 3 days of illness was 1.14 days (range 0–3 days), the mean number of days absent from work because of illness was 1.06 days (range 0–3 days), and the mean number of days not worked because of having a scheduled day off or any other reason was 0.80 days (range 0–3 days).
Data on access to telework were available for 1,362 adults and data on paid leave benefits for 1,356 adults; 198 (15%) reported having access to telework, and 1,074 (79%) received paid leave benefits. Among persons with access to telework, the median hours usually teleworked was 8 hours/week (5th, 95th percentile: 2, 30 hours/week). Adults who reported access to telework and paid leave were significantly different from those who reported no access by having higher education levels (p<0.001), working full time (p<0.01), and being salaried employees (p<0.001) (Table 1). Furthermore, adults with access to telework and paid leave were more likely to be encouraged by their employer to go home if they had influenza-like symptoms at work (p<0.01); these employees also had greater control over taking days off from work for illnesses (p<0.001) (Table 1).
The proportion of adults who worked the day before illness was similar for those with access to telework compared with those without access, as well as for those with paid leave benefits compared with those without (Table 1). Among adults who worked the day before illness, telework was more common among those with access to telework (habitual teleworkers) than for those who were not habitual teleworkers (14% vs. 1%, p<0.001).
During the first 3 days of illness, the proportion who did not work at all was 28% (55/198) for those with access to telework compared with 41% (477/1,164) for those without telework access (p<0.001). The mean of the total days worked was greater for adults with access to telework than for adults without access to telework (mean 1.46 vs. 1.09 days; p<0.001) (Table 2). This difference was attributable to more days teleworking while ill, as there was no difference in the mean number of days worked at the usual workplace while ill (Table 2). Adults without access to telework took more time off because of illness (mean 1.10 vs. 0.80 days; p<0.001). In contrast, adults with access to paid leave showed no differences in the mean total days worked during acute illness or mean days worked at the usual workplace, compared with those among persons without access to paid leave (Table 2).
The results of zero-inflated Poisson regression analyses showed that participants who had access to paid leave were significantly less likely to work during the first 3 days of illness (adjusted ratio of days worked 0.81, 95% CI 0.68–0.96) or to work at their usual workplace (adjusted ratio of days worked 0.81, 95% CI 0.67–0.96) (Table 3). Persons who worked in an organization in which employees were discouraged from coming to work if they had influenza-like symptoms were also significantly less likely to work during the first 3 days of illness (adjusted ratio 0.86, 95% CI 0.76–0.97) or to work at their usual workplace (adjusted ratio 0.85, 95% CI 0.74–0.96) (Table 3). In contrast, persons with access to telework were significantly more likely to work during the first 3 days of illness (adjusted ratio 1.25, 95% CI 1.07–1.46) (Table 3). However, access to telework was not associated with the number of days worked at the usual workplace (adjusted ratio 0.98, 95% CI 0.82–1.17) (Table 3).
The findings were similar among workers with laboratory-confirmed influenza (Table 4; Appendix Tables 3–5). Results were similar for sites with higher proportions of valid responses (Washington and Wisconsin) and lower proportions (Michigan, Pennsylvania, and Texas sites) (Appendix Table 6). The analysis by hours teleworked showed similar findings (Appendix Table 7).
Among working adults who sought medical care for an ARI from 5 sites across the country, we found that 79% had access to paid leave and 15% were able to telework. Our study results show that both paid leave benefits and business practices that actively encourage employees to stay home when ill may be necessary to keep sick employees away from the workplace. Access to telework, where feasible, helps retain some work productivity.
Because infectiousness of adults with influenza is greatest during the first 3 days of illness (19,20), preventing workplace attendance of ill persons during the first several days of illness might be most necessary for reducing workplace-based transmission. In previous research, a greater proportion of workers reported going to work always or most of the time when they have a cold or influenza, compared with those experiencing more serious illnesses, injuries, or major physical problems (21). Reasons for working while experiencing influenza-like illness (ILI) include still being able to perform job duties, not feeling bad enough to miss work, not thinking their illness is contagious or could make other persons sick, and professional obligation to co-workers (22). We have documented that workplace cultures that encourage employees to refrain from coming to work when ill may play a crucial role in keeping workers away from the workplace when sick. In this study, persons with access to paid leave worked fewer days overall and at the usual workplace while ill. Two previous studies reported that access to paid sick days was associated with staying home for medically confirmed ILI or influenza (23,24), and 1 study found no association between having paid sick leave benefits and staying home from work because of ILI (25). These 3 studies did not assess telework.
We found that workers with access to telework used this benefit to work more total days while ill than those without it. Access to telework may enable persons to work from home on a day that they might otherwise have to take a sick day to comply with the “stay home when sick” recommendation. Availability of telework options is therefore possibly beneficial from the employer’s perspective in terms of reduced sick leave usage and preserved productivity. However, we observed little difference between workers who have access to telework and those who do not regarding the number of days worked at the usual workplace while sick. This finding suggests that just having telework policies in place may not be sufficient to keep workers with access to telework from going to their workplace while sick. More effort is needed to encourage sick workers with telework access to work from home instead of at their usual workplace. In contrast to our findings with regard to telework, a previous study of workers in 3 large US companies (a national retail chain, a transportation company, and a durable goods manufacturing company) during the 2007–08 influenza season reported that workers who could telework had a 30% lower rate of attending work at their usual worksite when they had severe ILI symptoms (26). However, the authors acknowledged that their study was based on a convenience sample of only 3 employers, which limited the generalizability of their findings.
The 2017–18 influenza season, during which influenza A(H3N2) viruses predominated, was a high-severity season with widespread influenza activity across the country for an extended period (27). The influenza A(H3N2) strain typically causes more severe symptoms than the influenza A(H1N1) strain (28). The health-related workplace absenteeism rate in the 2017–18 influenza season was higher than the average rate of the previous 5 seasons (29). It is unknown whether the findings of this study would be similar in a less-severe influenza season. However, our results were similar for influenza-negative ARI cases, which are usually less severe than influenza cases. Thus, it seems likely that the findings would be similar in less-severe influenza seasons.
Our study has some limitations. First, almost one third of eligible adults were excluded from the analysis because of invalid responses regarding work attendance during the first 3 days of illness. However, similar results were seen for the Washington and Wisconsin sites, which had higher rates of valid responses than the other 3 sites. Second, we assessed work attendance during the first 3 days of illness. Further research on work attendance during the subsequent days of illness may be helpful. Third, our study was conducted among workers with medically attended ARI. The findings may not be generalizable to workers with non–medically attended ARI, which tends to be less severe (30). Fourth, our study indicates that employees with access to telework worked more days overall than those without telework access. We did not, however, assess actual levels of workplace productivity or measures of output. Adults may have reduced work performance if they worked, whether on-site or remotely from home, while not feeling well (13,31). Fifth, our definition of paid leave included both paid sick days and paid vacation days. Because paid vacation leave may be less flexible than paid sick leave for taking time off on short notice for an unexpected illness (15), more research is needed to assess the effect of paid sick days on work attendance among persons with ARI or influenza. Finally, although we adjusted for potential confounding variables, an observational study such as ours cannot rule out the possibility that unmeasured variables (e.g., occupation) may have distorted the results. However, the proportion who worked the day before illness, which represents baseline measurement of the outcome, was similar between the intervention and control groups (e.g., telework access versus no telework access), indicating that the groups were initially comparable with a lower likelihood of the presence of confounding variables (32).
The desired public health result of employee access to paid leave and telework is an increased ability to comply with the public health recommendation to stay home when ill, which helps decrease risk of disease transmission in the workplace. Ideally, staying home when ill with a respiratory infectious disease should eventually become commonplace behavior or even a social norm. Having access to paid leave is likely a critical enabling factor that reduces financial barriers to staying away from work when ill (33–35). Organizational policies that are conducive to providing paid leave are therefore critically needed, but almost equally crucial are supportive business practices that actively encourage employees to stay home when sick. Therefore, both broader macro-level policy interventions and stimulation of business culture change at a micro level of individual work organizations, possibly even individual teams, may be necessary to help reduce the transmission of ARI and seasonal or pandemic influenza in workplaces.
About the Author
Dr. Ahmed is a senior epidemiologist at the Division of Global Migration and Quarantine, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA. His research interests include prevention and control of seasonal and pandemic influenza.
Acknowledgment
This work was supported by the Centers for Disease Control and Prevention. The University of Pittsburgh was also supported by the National Institutes of Health (grant no. UL1 TR001857).
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Article Title:
Paid Leave and Access to Telework as Work Attendance Determinants during Acute Respiratory Illness, United States, 2017–2018
Paid Leave and Access to Telework as Work Attendance Determinants during Acute Respiratory Illness, United States, 2017–2018
CME Questions
1. You are advising a large corporation about how to minimize spread of influenza and acute respiratory illness (ARI) in the workplace. According to the survey study by Ahmed and colleagues, which of the following statements about work attendance during ARI and associated characteristics among workers ages 19 to 64 years with medically attended ARI or influenza during the 2017–2018 influenza season is correct?
A. During the first 3 days of illness, two-thirds reported they did not work at all
B. Median interval was 12 days from illness onset to return to normal activities and 21 days from illness onset to recovery from illness
C. During the first 3 days of ARI, mean number of days worked was 1.14 (range, 0–3), days absent from work because of illness was 1.06 (range, 0–3) days, and days missed for any other reason was 0.8 (range, 0–3) days
D. One-third had access to telework, and half received paid leave benefits
2. According to the survey study by Ahmed and colleagues, which of the following statements about determinants of work attendance during the first 3 days after ARI onset among workers ages 19 to 64 years with medically attended ARI or influenza during the 2017–2018 influenza season is correct?
A. Persons with access to paid leave were significantly less likely to work during the first 3 days of illness (adjusted ratio [AR] of days worked = 0.81 [95% CI: 0.68, 0.96])
B. Working in an organization that discouraged employees from coming to work if they had influenza-like symptoms was not significantly linked to likelihood of working during the first 3 days of illness
C. Access to telework was significantly associated with the number of days worked at the usual workplace
D. Determinants of work attendance were significantly different for persons with vs persons without laboratory-confirmed influenza
3. According to the survey study by Ahmed and colleagues, which of the following statements about clinical implications of work attendance during the first 3 days after ARI onset among workers ages 19–64 years with medically attended ARI or influenza during the 2017–2018 influenza season is correct?
A. Lowering workplace transmission of ARI and influenza requires only paid leave benefits
B. The public health benefit of employee access to paid leave and telework is an increased ability to comply with the public health recommendation to stay home when ill
C. Employees who stay home with an ARI should be censured for lowering workplace productivity and shirking responsibility to coworkers
D. Macro-level policy intervention is the only level at which reducing ARI transmission is likely to be effective
Original Publication Date: 12/18/2019
1Preliminary results from this study were presented at the International Conference on Emerging Infectious Diseases, August 27–29, 2018, Atlanta, Georgia, USA.
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