Table 2 Incidences of pregnancy complications by parity and maternal age groups
Variables | Overall | Nulliparas | Multiparas | ||||||
|---|---|---|---|---|---|---|---|---|---|
20–29ya | 30–34y | ≥35y | p | 20–29y | 30–34y | ≥35y | p | ||
(n) | (10,171) | (4851) | (344) | (65) | (3010) | (1293) | (507) | ||
Gestational hypertension (n, %) | 430 (4.2) | 126 (2.6) | 34 (9.9) | 12 (18.5) | < 0.001 | 125 (4.2) | 109 (8.4) | 20 (3.9) | < 0.001 |
Preeclampsia/eclampsia (n, %) | 352 (3.5) | 106 (2.2) | 167 (4.9) | 12 (18.5) | < 0.001 | 114 (3.8) | 87 (6.7) | 16 (3.2) | < 0.001 |
Gestational diabetes mellitus (GDM, n, %) | 145 (1.4) | 63 (1.3) | 10 (2.9) | 1 (1.5) | 0.092 | 31 (1.0) | 23 (1.8) | 17 (3.4) | < 0.001 |
Anemia (n, %) | 380 (3.7) | 151 (3.1) | 6 (1.7) | 6 (9.2) | 0.006 | 119 (4.0) | 59 (4.6) | 37 (7.3) | 0.004 |
Polyhydramnios (n, %) | 89 (0.9) | 32 (0.7) | 4 (1.2) | 3 (4.6) | 0.001 | 21 (0.7) | 17 (1.3) | 12 (2.4) | 0.001 |
Oligohydramnios (n, %) | 101 (1.0) | 25 (0.5) | 13 (3.8) | 1 (1.5) | < 0.001 | 36 (1.2) | 17 (1.3) | 8 (1.6) | 0.462 |
Placenta previa (n, %) | 146 (1.4) | 33 (0.7) | 10 (2.9) | 0 (0.0) | < 0.001 | 52 (1.7) | 37 (2.9) | 14 (2.8) | 0.086 |
Premature rupture of membrane (n, %) | 90 (0.9) | 43 (0.9) | 7 (2.0) | 4 (6.2) | < 0.001 | 11 (0.4) | 14 (1.1) | 10 (2.0) | < 0.001 |
Infectious disease (n, %) | 158 (1.6) | 29 (0.6) | 3 (0.9) | 0 (0.0) | < 0.001 | 75 (2.5) | 36 (2.8) | 14 (2.8) | < 0.001 |
Threatened abortion (n, %) | 192 (1.9) | 59 (1.2) | 0 (0.0) | 0 (0.0) | 0.154 | 76 (2.5) | 48 (3.7) | 9 (1.8) | < 0.001 |
Preterm labor (n, %) | 950 (9.4) | 450 (9.3) | 38 (11.1) | 9 (13.8) | 0.37 | 241 (8.1) | 130 (10.1) | 73 (14.5) | < 0.001 |
Low birth weight (n, %) | 289 (2.8) | 37 (0.8) | 1 (0.3) | 1 (1.5) | 0.004 | 178 (5.9) | 45 (3.5) | 25 (4.9) | 0.002 |
Mode of delivery (n, %) | < 0.001 | < 0.001 | |||||||
Vaginal birth | 6371 (64.5) | 3401 (72.0) | 189 (56.9) | 94 (62.3) | 1852 (63.1) | 592 (47.4) | 243 (49.6) | ||
Caesarean | 3506 (35.5) | 1321 (28.0) | 143 (43.1) | 40 (63.5) | 1081 (36.9) | 657 (52.6) | 247 (51.1) | ||