Table 2.
Single-factor analysis of the related factors of CSR
| Variables | Total number (missing) | CS delivery, n (%) | Vaginal delivery, n (%) | CSR (%) | Statistics | P |
|---|---|---|---|---|---|---|
| Maternal age | −14.688* | <0.001 | ||||
| <25 years | 10,671 (0) | 759 (17.0) | 1528 (24.6) | 33.2 | ||
| 25–29 years | 2052 (45.9) | 3055 (49.3) | 40.2 | |||
| 30–34 years | 1282 (28.7) | 1493 (24.1) | 46.2 | |||
| ≥35 years | 378 (8.5) | 124 (2.0) | 75.3 | |||
| Prepregnancy BMI (kg/m2) | −14.969* | <0.001 | ||||
| <18.5 | 10,593 (78) | 514 (11.6) | 1074 (17.4) | 32.4 | ||
| 18.5–23.9 | 2839 (64.1) | 4256 (69.1) | 40.0 | |||
| 24–27.9 | 799 (18.0) | 666 (10.8) | 54.5 | |||
| ≥28 | 279 (6.3) | 166 (2.7) | 62.7 | |||
| GWG group | −11.094* | <0.001 | ||||
| Inadequate | 10,039 (632) | 530 (12.6) | 978 (16.8) | 35.1 | ||
| Adequate | 1245 (29.6) | 2158 (37.0) | 36.6 | |||
| Excessive | 2426 (57.7) | 2702 (46.3) | 47.3 | |||
| Blood glucose levels | 64.377† | <0.001 | ||||
| Normal | 10,671 (0) | 3405 (76.2) | 5092 (82.1) | 40.1 | ||
| GDM | 987 (22.1) | 1056 (17.0) | 48.3 | |||
| DM | 79 (1.8) | 52 (0.8) | 60.3 | |||
| Education | −2.561* | 0.010 | ||||
| Graduate and above | 10,012 (659) | 470 (11.1) | 690 (11.9) | 40.5 | ||
| College | 2703 (64.0) | 3470 (59.9) | 43.8 | |||
| High school | 617 (14.6) | 890 (15.4) | 40.9 | |||
| Junior school or lower | 433 (10.3) | 739 (12.8) | 36.9 | |||
| Residence | 95.935† | <0.001 | ||||
| Urban | 10,620 (51) | 3310 (74.3) | 4032 (65.4) | 45.1 | ||
| Rural | 1145 (25.7) | 2133 (34.6) | 34.9 | |||
| Average monthly income (RMB, Yuan) | −1.106* | 0.269 | ||||
| <1000 | 10,140 (531) | 2918 (68.3) | 4.65 (69.3) | 41.8 | ||
| 1000–2999 | 1268 (29.7) | 1686 (28.7) | 42.9 | |||
| 3000–4999 | 82 (1.9) | 107 (1.8) | 43.4 | |||
| ≥5000 | 6 (0.1) | 8 (0.1) | 42.9 | |||
| Fetal birth weight (g) | −10.969* | <0.001 | ||||
| <2500 | 10,671 (0) | 204 (4.6) | 168 (2.7) | 54.8 | ||
| 2500–2999 | 582 (13.0) | 976 (15.7) | 37.4 | |||
| 3000–3499 | 1681 (37.6) | 2969 (47.9) | 36.2 | |||
| 3500–3999 | 1447 (32.4) | 1831 (29.5) | 44.1 | |||
| 4000–4499 | 490 (11.0) | 241 (3.9) | 67.0 | |||
| ≥4500 | 67 (1.5) | 15 (0.2) | 81.7 |
*Statistics shown as Z; † Statistics shown as χ2. CS: Cesarean section; CSR: Cesarean section rate; GDM: Gestational diabetes mellitus; DM: Diabetes mellitus; BMI: Body mass index; GWG: Gestational weight gain.