Characteristic | ≤60s (n = 134) | 61–89 s (n = 106) | ≥90s (n = 105) | P |
---|---|---|---|---|
Age (year) | 30.99 ± 3.98 | 30.95 ± 4.23 | 30.93 ± 3.86 | > 0.990 |
Age at menarche (year) | 0.890 | |||
≤ 14 | 115(85.8) | 93(87.7) | 90(85.7) | |
> 14 | 19(14.2) | 13(12.3) | 15(14.3) | |
BMI (kg/m2) | ||||
Pre-pregnancy | 21.83 ± 3.69 | 21.91 ± 2.75 | 21.65 ± 3.16 | 0.560 |
Antenatal | 26.75 ± 4.19 | 26.83 ± 3.69 | 26.98 ± 3.28 | 0.930 |
Occupation | 0.036# | |||
Civil servant | 23 (17.0) | 34 (32.0) | 19 (18.0) | |
Professional and technical staff | 50 (37.0) | 37 (35.0) | 45 (43.0) | |
Other | 61 (46.0) | 35 (33.0) | 41 (39.0) | |
Education | 0.880 | |||
High level | 31 (23.0) | 21 (20.0) | 24 (23.0) | |
Middle level | 61 (46.0) | 55 (52.0) | 48 (46.0) | |
Low level | 42 (31.0) | 30 (28.0) | 33 (31.0) | |
Smoking during pregnancy | 0.640 | |||
Yes | 2 (1.0) | 0 (0.0) | 1 (1.0) | |
No | 132 (99.0) | 106 (100.0) | 104 (99.0) | |
Passive smoking before pregnancy | 0.370 | |||
Yes | 28 (21.0) | 15 (14.0) | 21 (20.0) | |
No | 106 (79.0) | 91 (86.0) | 84 (80.0) | |
Drinking alcohol before pregnancy | 0.670 | |||
Yes | 2 (1.0) | 1 (1.80) | 0 (0.0) | |
No | 132 (99.0) | 105 (98.20) | 105 (100.0) | |
History of chronic illness | 0.019* | |||
Yes | 22 (16.4) | 14 (13.2) | 5 (4.8) | |
No | 112 (83.6) | 92 (86.8) | 100 (95.2) | |
Drugs or health supplements during pregnancy | 0.840 | |||
Yes | 109 (81.0) | 87 (82.0) | 83 (79.0) | |
No | 25 (19.0) | 19 (18.0) | 22 (21.0) | |
Oxygen inhalation after 36 weeks of pregnancy | 0.220 | |||
Yes | 23 (17.2) | 10 (9.0) | 14 (13.0) | |
No | 111 (82.8) | 96 (91.0) | 91 (87.0) | |
Pregnant mother’s blood type (ABO) | 0.100 | |||
A | 27 (20.0) | 28 (26.0) | 31 (30.0) | |
B | 48 (36.0) | 31 (29.0) | 40 (38.0) | |
AB | 16 (12.0) | 16 (15.0) | 4 (4.0) | |
O | 43 (32.0) | 31 (29.0) | 30 (28.0) | |
Pregnant mother’s blood type (RH) | 0.600 | |||
RH (+) | 132 (99.0) | 105 (99.0) | 102 (97.0) | |
RH (−) | 2 (1.0) | 1 (1.0) | 3 (3.0) | |
Spouse’s blood type (ABO) | 0.091 | |||
A | 20 (15.0) | 19 (18.0) | 8 (8.0) | |
B | 75 (56.0) | 50 (47.0) | 54 (51.0) | |
AB | 12 (9.0) | 10 (10.0) | 19 (18.0) | |
O | 27 (20.0) | 27 (25.0) | 24 (23.0) | |
Spouse’s blood type (RH) | > 0.990 | |||
RH (+) | 133 (99.0) | 106 (100.0) | 105 (100.0) | |
RH (−) | 1 (1.0) | 0 (0.0) | 0 (0.0) | |
Gestation | 0.460 | |||
1 | 60 (45.0) | 43 (40.60) | 43 (41.0) | |
2 | 45 (34.0) | 42 (39.60) | 32 (30.0) | |
≥ 3 | 29 (22.0) | 21 (19.80) | 30 (29.0) | |
Production | 0.650 | |||
1 | 81 (60.0) | 66 (62.0) | 59 (56.0) | |
≥ 2 | 53 (40.0) | 40 (38.0) | 46 (44.0) | |
Live | 0.720 | |||
1 | 82 (61.0) | 66 (62.0) | 60 (57.0) | |
≥ 2 | 52 (39.0) | 40 (38.0) | 45 (43.0) | |
Abortion | 0.120 | |||
0 | 91 (68.0) | 70 (66.0) | 64 (61.0) | |
1 | 28 (21.0) | 20 (19.0) | 33 (31.0) | |
≥ 2 | 15 (11.0) | 16 (15.0) | 8 (8.0) | |
Gestational age (days) | 276.46 ± 7.03 | 276.85 ± 6.98 | 277.49 ± 6.69 | 0.540 |
Oxytocin | 0.820 | |||
Yes | 47 (34.0) | 41 (38.0) | 40 (39.0) | |
No | 87 (66.0) | 65 (62.0) | 65 (61.0) | |
Glucose solution without electrolytes use | 0.470 | |||
Yes | 5 (4.0) | 2 (2.0) | 5 (5.0) | |
No | 129 (96.0) | 104 (98.0) | 100 (95.0) | |
Assisted reproductive technologies | 0.631 | |||
Yes | 1(0.8) | 1(0.9) | 0(0.0) | |
No | 133(99.2) | 105(99.1) | 105(100.0) |