Table 1 Distribution of selected characteristics of nulliparous women with and without induced abortion.
Characteristic | Observed population(N) | Previous IA | χ2 | p | ||
|---|---|---|---|---|---|---|
No (N = 3813) (%) | Yes N = 1378 (%) | |||||
Maternal age (years) | <35 | 5138 | 3789(99.4) | 1349(97.9) | 21.793 | 0.000 |
≥35 | 53 | 24(0.6) | 29(2.1) | |||
Education (years) | ≤12 | 3974 | 2872(75.3) | 1102(80.0) | 12.193 | 0.000 |
>12 | 1217 | 941(24.7) | 276(20.0) | |||
Occupation | Unemployed | 3091 | 2267(59.5) | 824(59.8) | 0.049 | 0.824 |
Employed | 2100 | 1546(40.5) | 554(40.2) | |||
Living area | Rural | 4313 | 3173(83.2) | 1140(82.7) | 0.171 | 0.680 |
City | 878 | 640(16.8) | 238(17.3) | |||
BMI at the first antenatal visit (kg/m2) | <24 | 4623 | 3429(89.9) | 1194(86.6) | 11.188 | 0.001 |
≥24 | 568 | 384(10.1) | 184(13.4) | |||
Alcohol consumption | No | 5101 | 3752(98.4) | 1349(97.9) | 1.513 | 0.219 |
Yes | 90 | 61(1.6) | 29(2.1) | |||
Smoking | No | 5170 | 3802(99.7) | 1368(99.3) | 4.802 | 0.028 |
Yes | 21 | 11(0.3) | 10(0.7) | |||
Anemia | No | 5026 | 3697(97.0) | 1329(96.4) | 0.868 | 0.352 |
Yes | 165 | 116(3.0) | 49(3.6) | |||
Virus infection | No | 4899 | 3621(95.0) | 1278(92.7) | 9.409 | 0.002 |
Yes | 292 | 192(5.0) | 100(7.3) | |||
GDM | No | 5119 | 3762(98.7) | 1357(98.5) | 0.257 | 0.612 |
Yes | 72 | 51(1.3) | 21(1.5) | |||
History of medical disorders | No | 4899 | 3620(94.9) | 1279(92.8) | 8.591 | 0.003 |
Yes | 292 | 193(5.1) | 99(7.2) | |||
Conception climate | Winter type | 2201 | 1630(42.7) | 571(41.4) | 2.717 | 0.257 |
Transitional type | 1693 | 1253(32.9) | 440(31.9) | |||
Summer type | 1297 | 930(24.4) | 367(26.6) | |||
Infant sex | Boy | 2718 | 1987(52.1) | 731(53.0) | 0.356 | 0.551 |
Girl | 2473 | 1826(47.9) | 647(47.0) | |||
psychological stress | No | 5004 | 3673(96.4) | 1331(96.6) | 0.101 | 0.750 |
Yes | 184 | 137(3.6) | 47(3.4) | |||
