Menopausal Symptoms, Perceived Workplace Openness and Work Productivity Among Japanese Women: Baseline Findings from a Large-Scale Cohort Study

This study analyzed baseline data from a six-month longitudinal cohort to describe the demographic, occupational, and symptom profiles of Japanese working women and to examine associations between menopausal symptoms, workplace openness, and work productivity. A total of 4000 women aged 40–60 years completed the Simplified Menopause Index (SMI), a commonly used measure in Japan to assess menopausal symptoms, and the validated Health and Work Performance Questionnaire (HPQ) to assess self-rated work productivity. Multiple regression analyses were conducted, adjusting for demographic and occupational covariates. Psychological symptoms showed the strongest negative association with work productivity (β = −0.186, p < 0.001), while vasomotor symptoms showed a small positive coefficient (β = 0.054, p = 0.007). Somatic symptoms were not significant (β = −0.033, p = 0.121). Lower perceived workplace openness was associated with lower productivity (β = −0.149, p < 0.001), such that employees who felt uncomfortable or unsure about discussing health concerns reported lower productivity. Higher educational attainment, longer working hours, and longer years of service were also associated with higher productivity. These findings indicate that psychological and physical symptoms are associated with lower work functioning during midlife, while supportive organizational environments appear to be relevant in this context. These cross-sectional findings provide a foundation for future longitudinal analyses and highlight the potential relevance of workplaces that promote open health communication.