Table 3 Characteristics of the study populations
From: A descriptive analysis of the indications for caesarean section in mainland China
All | Vaginal delivery | Overall rate of CS, n (%) | Caesarean section | P | ||||
|---|---|---|---|---|---|---|---|---|
Spontaneous, n (%) | Operative, n (%) | With medical indication, n (%) | Without medical indication n (%) | |||||
Maternal age, years | ≤24 | 23403 | 12005 (51.30) | 142 (0.61) | 11256 (48.10) | 7011 (29.96) | 4245 (18.14) | <0.001 |
25–29 | 43661 | 20118 (46.08) | 580 (1.33) | 22663 (51.91) | 16135 (36.96) | 6528 (14.95) | ||
30–34 | 25155 | 9992 (39.72) | 387 (1.54) | 14776 (58.74) | 11072 (44.02) | 3704 (14.72) | ||
≥35 | 9729 | 2856 (29.36) | 7 (0.76) | 6799 (69.88) | 5541 (56.95) | 1258 (12.93) | ||
Pre-labour BMI | <18.5 | 107 | 62 (57.94) | 4 (3.74) | 41 (38.32) | 12 (11.21) | 29 (27.10) | <0.001 |
18.5–24.9 | 25059 | 13507 (53.9) | 319 (1.27) | 11233 (44.83) | 3178 (12.68) | 8055 (32.14) | ||
25–29.9 | 50802 | 22775 (44.83) | 676 (1.33) | 27347 (53.83) | 7026 (13.83) | 20321 (40) | ||
≥30 | 15991 | 5045 (31.55) | 146 (0.91) | 10799 (67.53) | 2174 (13.60) | 8625 (53.94) | ||
Previous births, n | 0 | 91208 | 39677 (43.50) | 1242 (1.36) | 50282 (55.13) | 35306 (38.71) | 14976 (16.42) | <0.001 |
1 | 19077 | 9038 (47.38) | 89 (0.47) | 9950 (52.16) | 8418 (44.13) | 1532 (8.03) | ||
≥2 | 2140 | 1025 (47.90) | 10 (0.47) | 1105 (51.64) | 957 (44.72) | 148 (6.92) | ||
Sex of child | Male | 55620 | 23830 (42.84) | 706 (1.27) | 31084 (55.89) | 22349 (40.18) | 8735 (15.70) | <0.001 |
Female | 46804 | 21441 (45.81) | 482 (1.03) | 24881 (53.16) | 17706 (37.83) | 7175 (15.33) | ||