An inquiry into the causal relationship among leisure vacation, depression, and absence from work

Does paid vacation leave protect against depression among working Americans? A national longitudinal fixed effects analysis

Objectives The United States is the only advanced economy globally that does not guarantee its workers paid vacation leave. Although empirical studies have linked paid vacation leave to happiness and stress, no study has investigated the association between paid vacation leave and depression. Using a nationally-representative longitudinal sample of 3380 working men and women aged 45-52 years from the National Longitudinal Survey of Youth 1979, this study explored whether paid vacation leave may protect against depression. Methods Multivariate linear and logistic regression models were employed to estimate the impacts of the number of annual paid vacation days of leave measured at age 40 on depression measured using the 7-item Center for Epidemiologic Studies Depression Scale short form (CES-D-SF) scale at age 50. Models were adjusted for demographic and socioeconomic factors, physical health, weekly hours, and individual fixed effects. Results For every ten additional days of paid vacation leave, the odds of depression in women was 29% lower [odds ratio (OR) 0.71, 95% confidence interval (CI) 0.55-0.92, P=0.01); there was no association in men. Linear regression models showed no association in either men or women. For every 10 days of paid leave, the odds of depression were 36% lower in White women and 38% lower in women with ≥2 children. Conclusions This study provides the first evidence on the linkage between paid vacation leave and depression, and supports a protective effect in White women with ≥2 children. Should this association be truly causal, and assuming a uniform effect across all ages in working adult women, the results from this study would suggest that a hypothetical increase in the average number of days of paid vacation leave of 10 days could avoid an estimated 568 442 cases of depression in women each year and lead to a cost savings of US$2.94 billion annually. Policies that mandate paid vacation leave may have marked positive impacts on the population health and economic burden of depression among working women in the USA.

Buffering effects of job resources on the association of overtime work hours with psychological distress in Japanese white-collar workers

PURPOSE

The purpose of the present study was to investigate the buffering effects of job resources, utilizing the job demands-control (or demand-control-support) and effort-reward imbalance models (i.e., job control, workplace social support, and extrinsic reward), on the association of overtime work hours with psychological distress in Japanese employees.

METHODS

A total of 1,198 participants (valid response rate = 93.7 %) from five branches of a manufacturing company in Japan completed a self-administered questionnaire comprising the scales assessing job resources, psychological distress, and demographic characteristics. We obtained the information on working hours in the most recent month from the personnel records of the surveyed company. Multiple logistic regression analyses were conducted. In a series of analyses, interaction term of overtime work hours with each job resource was included in the model.

RESULTS

Significant interaction effect of overtime work hours with job control was observed. Among the low job control group, the long overtime (80 h or more) subgroup had a significantly higher prevalence odds ratio of psychological distress compared to the short overtime (44 h or less) subgroup. No significant association of overtime work hours with psychological distress was found among the high job control group. On the other hand, there was no significant interaction effect of overtime work hours with workplace social support or extrinsic reward.

CONCLUSIONS

The present findings suggest that high job control has an effect on reducing psychological distress in relation to overtime work hours in Japanese employees.

[Concept analysis of presenteeism and its possible applications in Japanese occupational health]

The purposes of this systematic review were to define the concept of presenteeism in accordance with Rodgers' concept analysis methods and to examine the possibility of applying the concept to Japanese occupational health. Using presenteeism as a search term, articles were selected from the MEDLINE, PsycINFO and Japana Centra Revuo Medicina databases. The definitions, antecedents, and consequences of presenteeism were extracted from the selected articles and were examined in order to determine how presenteeism was used in the literature. A total of forty-four articles published from 1955 to 2005 were selected for analysis. Based on the extracted definitions, four attributes of presenteeism were identified, and presenteeism was defined as "a self-rated measurable loss of work performance due to health problems in the workplace." Antecedents of presenteeism were classified into occupational and personal factors. These factors affected the decisions of workers with health problems regarding whether or not to go to work. Consequences of presenteeism were the aggravation of quality of life and health status, increases in health-related costs, adverse effects on colleagues, increases in occupational accidents, and deterioration of the quality of products and services. Therefore, the reduction of presenteeism is considered to be an important challenge for occupational health professionals. Possible applications of the concept of presenteeism in Japanese occupational health are the following: 1) measurement of presenteeism and examination of its related factors, 2) identification of factors that discourage workers from taking adequate sickness absenteeism, and 3) design of occupational health activity plans and the evaluation of such activities. In order to measure presenteeism in Japan, it is necessary to introduce Euro-American instruments suitable for the purpose of measuring presenteeism and to develop new measures. Occupational health professionals can incorporate assessments of presenteeism in their occupational health activities by considering not only the individual state of presenteeism, but also the state of the entire organization and interaction among workers' health problems, occupational factors, and personal factors. Moreover, if the loss of work performance due to presenteeism is converted to financial loss, it is considered that the necessity and the validity of workplace-based health activities will be clarified.