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Table 2 Relationship between obstetrical and gynecological factors and SUI

From: Epidemiological survey of adult female stress urinary incontinence

Relevant factors N SUI χ2 P
N %
Age at menarche
 11 191 42 22 15 0.001
 12–15 2794 973 34.8   
 > 15 1019 326 32   
Sexual history
 Yes 3145 1178 37.5 103 < 0.001
 No 859 163 19   
Oral contraceptives
 Yes 854 328 38.4 12 0.001
 No 3150 1013 32.2   
Number of pregnancies
 0 1222 212 17.3 221 < 0.001
 1–2 1652 623 37.7   
  ≥ 3 1130 506 44.8   
Number of miscarriages
 0 2450 710 29.5 55 < 0.001
 1–2 1389 571 41.1   
  ≥ 3 210 60 28.6   
Age at first birth
 < 20 78 33 42.3 211 < 0.001
 20–25 1409 569 40.4   
 26–30 1170 492 42.1   
 > 30 103 22 21.4   
Mode of delivery
 Vaginal 2038 906 44.5 235 < 0.001
 Cesarean section 693 187 27   
Birth weight (kg)
 < 3.5 1692 694 41 184 < 0.001
  ≥ 3.5 1040 409 39.3   
Number of deliveries
 0 1828 390 21.3 227 < 0.001
 1–2 1764 754 42.7   
  ≥ 3 412 197 47.8   
Episiotomy
 Yes 594 320 53.9 233 < 0.001
 No 2169 784 36.1   
Dystocia
 Yes 201 106 52.7 190 < 0.001
 No 2570 1004 39.1   
Menopause
 Yes 1040 394 37.9 12 < 0.001
 No 2964 947 32   
  1. SUI stress urinary incontinence