Table 1 Socio-demographic characteristics of participants by menopausal status
| Â | Total | Reproductive stage | Perimenopause | Postmenopause | P value |
|---|---|---|---|---|---|
Participants, n (%) | 7275 | 3270 (44.9) | 1257 (17.3) | 2748 (37.8) | Â |
Age, years, median (IQR) | 48 (44, 52) | 44 (42, 47) | 47 (44, 49) | 54 (50, 56) |  < 0.001 |
Place of residence |  |  |  |  |  < 0.001 |
 Urban | 3658 (50.3) | 1659 (50.7) | 570 (45.4) | 1429 (52.0) |  |
 Rural | 3617 (49.7) | 1611 (49.3) | 687 (54.6) | 1319 (48.0) |  |
Education |  |  |  |  |  < 0.001 |
 High school and below | 6590 (90.6) | 2833 (86.6) | 1135 (90.3) | 2622 (95.4) |  |
 College or graduate school | 685 (9.4) | 437 (13.4) | 122 (9.7) | 126 (4.6) |  |
Employment status |  |  |  |  |  < 0.001 |
 Unemployed/retired | 1403 (19.3) | 494 (15.1) | 206 (16.4) | 703 (25.6) |  |
 Employed | 5872 (80.7) | 2776 (84.9) | 1051 (83.6) | 2045 (74.4) |  |
Marital status |  |  |  |  |  < 0.001 |
 Married | 6668 (91.7) | 3080 (94.2) | 1132 (90.1) | 2456 (89.4) |  |
 Single/divorced/widowed | 607 (8.3) | 190 (5.8) | 125 (9.9) | 292 (10.6) |  |
Average monthly household income, RMB |  |  |  |  |  < 0.001 |
 < 5000 | 4865 (66.9) | 1932 (59.1) | 851 (67.7) | 2082 (75.8) |  |
 5000–10,000 | 2114 (29.1) | 1184 (36.2) | 358 (28.5) | 572 (20.8) |  |
 > 10,000 | 296 (4.0) | 154 (4.7) | 48 (3.8) | 94 (3.4) |  |
Parity |  |  |  |  |  < 0.001 |
 Nulliparous | 134 (1.8) | 77 (2.4) | 31 (2.5) | 26 (1.0) |  |
 Multiparous | 7141 (98.2) | 3193 (97.6) | 1226 (97.5) | 2722 (99.0) |  |