Table 1 Demographic and obstetrical information of subjects with menstrual irregularities in case and control groups
From: The risk of menstrual abnormalities after tubal sterilization: a case control study
(57) case group | (143) control group | df | pv | |
|---|---|---|---|---|
No. (%) | No. (%) | |||
Age groups(year): | ||||
30–39 | 31(54.3) | 50(34.96) | 1 | 0.0176819 |
40–45 | 26(45.6) | 93(65.1) | ||
Parity groups (No.): | ||||
2–4 | 8(14) | 31(22) | 2 | 0.3819013 |
5–7 | 28(50) | 58(40) | ||
>7 | 21(36) | 54(38) |