Table 3 Characteristics of the study cohort: Reproductive factors
Variable | n = 89434(%) |
|---|---|
Age at menarche | |
9-10 | 2675 (2.99) |
11-13 | 59433 (66.46) |
14-16 | 26231 (29.33) |
17-18 | 1095 (1.22) |
Still have periods | |
Yes | 39281 (43.92) |
No | 50153 (56.08) |
Menstrual status | |
Pre-menopause | 49201 (55.01) |
Post-menopause | 40233 (44.99) |
Menstruation length (years) (mean±SD) | 32.10(±5.85) |
Number of live births | |
Nulliparous | 13173 (14.73) |
1-2 | 32781 (36.65) |
3-4 | 33952 (37.96) |
> = 5 | 9528 (10.66) |
Regular periods | |
Yes | 70635 (78.98) |
No | 18799 (21.02) |
Had a hysterectomy | |
Yes | 27584 (30.84) |
No | 27584 (69.16) |
Had a bi-lateral oophorectomy | |
Yes | 9567 (10.70) |
No | 79867 (89.30) |
Ever pregnant | |
Yes | 78870 (88.19) |
No | 10564 (11.81) |
Number of pregnancies | |
0 | 13173 (14.73) |
1-2 | 23050 (25.77) |
3-4 | 34721 (38.82) |
5-10 | 17966 (20.09) |
11-17 | 524 (0.59) |
Pregnancies lasted < 4 months | |
0 | 60228 (67.35) |
1-2 | 25563 (28.58) |
3-4 | 2998 (3.35) |
5-10 | 645 (0.72) |
Age at first child birth | |
N/A | 13173 (14.73) |
14-19 | 8345 (9.33) |
20-25 | 42234 (47.22) |
26-30 | 18756 (20.97) |
31-34 | 4683 (5.24) |
35-39 | 2011 (2.25) |
40-49 | 232 (0.26) |