Table 3 The application of cutoff values in the subgroups
Groups | Cycles | BP n (%) | CP n (%) | APO n (%) | Twins n (%) | Singleton n (%) | Gestational age mean (SD) | Birth weight mean (SD) | Birth length mean (SD) | Proportion of male babies n (%) | Cesarean section rate n (%) | Post-term birth rate n (%) | Preterm birth rate n (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(5–89.6] | 411 | 359 (87.4%) | 52 (12.7%) | 44 (84.6%) | 0a,b,c (0%) | 5a,b,c (0.3%) | 39.1 (2.1) | 3530.0 (739.6) | 50.2 (1.5) | 2 (40.0%) | 4 (80.0%) | 1 (20.0%) | 1 (20.0%) |
(89.6–241.1] | 279 | 64 (22.9%) | 215 (77.1%) | 118 (54.9%) | 0c (0%) | 76c (4.5%) | 38.6 (2.4) | 3300.6 (716.7) | 50.2 (3.2) | 49 (54.5%) | 57 (75.0%) | 6 (7.9%) | 13 (17.1%) |
(241.1–585.9] | 871 | 23 (2.6%) | 848 (97.4%) | 224 (26.4%) | 33c (6.5%) | 476c (27.9%) | 39.0 (1.6) | 3360.68 (571.2) | 50.3 (1.9) | 258 (54.2%) | 337 (70.8%) | 16 (3.4%) | 42 (8.8%) |
(585.9–981.1] | 1114 | 8 (0.7%) | 1106 (99.3%) | 127 (11.5%) | 168b (20.8%) | 639b (37.5%) | 39.0 (1.7) | 3383.9 (528.0) | 50.4 (2.1) | 326 (51.0%) | 439 (78.6%) | 8 (1.3%) | 41 (6.4%) |
> 981.1 | 1368 | 3 (0.2%) | 1365 (99.8%) | 119 (8.7%) | 484a (48.8%) | 508a (29.8%) | 38.9 (1.6) | 3326.0 (557.2) | 50.1 (2.0) | 278 (54.7%) | 365 (71.9%) | 10 (2.0%) | 47 (9.3%) |
P | < 0.001 | < 0.001 | < 0.001 | < 0.001 | 0.249 | 0.365 | 0.486 | 0.197 | 0.659 | < 0.001 | |||