Table 1 Basic characteristics of study subjects at baseline survey of the JPHC study.
Characteristic | Total | Menopausal status at inclusion | |
|---|---|---|---|
Pre-menopause | Post-menopause | ||
Number of subjects (n) | 49 279 | 26 456 (53.7%) | 22 824 (46.3%) |
Age at recruitment, ya | 50.9 (7.8) | 44.6 (4.0) | 56.3 (6.1) |
BMI (Kg/m2)a | 23.3 (3.2) | 23.1 (3.1) | 23.6 (3.3) |
Never smoker (%) | 90.3 | 88.2 | 83.1 |
Non-drinker (%) | 74.2 | 66.5 | 80.8 |
High perceived stress (%) | 16.5 | 23.2 | 16.5 |
Living with spouse (%) | 79.2 | 82.7 | 76.2 |
History of diseases (%) | 19.2 | 3.9 | 27.7 |
Reproductive factors | |||
Paritya | 2.7 (1.5) | 2.4 (1.2) | 2.8 (1.7) |
Age at first birth, ya,b | 25.0 (3.5) | 25.2 (3.5) | 24.9 (3.5) |
Ever breastfed (%)b | 86.8 | 84.5 | 88.9 |
Age at menarche, ya | 14.5 (1.9) | 13.7 (1.5) | 15.1 (1.9) |
Age at menopause, ya,c | 48.1 (4.8) | 48.1 (4.8) | |
Total fertility yearsa,c,d | 33.0 (4.8) | 33.0 (4.8) | |
Ever use of exogenous hormones (%) | 13.4 | 14.0 | 12.8 |
