Table 2 Characteristics of the participants by parity
Characteristics | Total (N = 1209) | Nullipara (n = 841) | Multipara (n = 368) | Statistic | P value |
|---|---|---|---|---|---|
Age (years), n (%) | 191.721a | <.001 | |||
20-24y | 78 (6.5) | 57 (6.8) | 21 (5.7) | ||
25-29y | 533 (44.1) | 462 (54.9) | 71 (19.3) | ||
30-34y | 456 (37.7) | 276 (32.8) | 180 (48.9) | ||
35-39y | 119 (9.8) | 44 (5.2) | 75 (20.4) | ||
≥ 40y | 23 (1.9) | 2 (0.2) | 21 (5.7) | ||
Educational level, n (%) | 9.067a | 0.028 | |||
Junior high school or below | 162 (13.4) | 102 (12.1) | 60 (16.3) | ||
Senior high/ technical school | 250 (20.7) | 169 (20.1) | 81 (22.0) | ||
College graduate | 597 (49.4) | 438 (52.1) | 159 (43.2) | ||
Postgraduate | 200 (16.5) | 132 (15.7) | 68 (18.5) | ||
Household monthly income per capita, CNY, n (%) | 0.605a | 0.895 | |||
< 5000 | 95 (7.9) | 69 (8.2) | 26 (7.1) | ||
5000-7999 | 239 (19.8) | 168 (20.0) | 71 (19.3) | ||
8000-10,000 | 279 (23.1) | 193 (22.9) | 86 (23.4) | ||
> 10,000 | 596 (49.3) | 411 (48.9) | 185 (50.3) | ||
Gestational weeks, mean (SD) | 39.56 (1.02) | 39.66 (1.02) | 39.34 (1.01) | 5.159b | 0.762 |
Prepregnancy weight category, n (%) | 7.536a | 0.057 | |||
Underweight (BMI < 18.5 kg/m2) | 226 (18.7) | 146 (17.4) | 80 (21.7) | ||
Normal weight (BMI 18.5–24.9 kg/m2) | 875 (72.4) | 613 (72.9) | 262 (71.2) | ||
Overweight (BMI 25.0–29.9 kg/m2) | 100 (8.3) | 78 (9.3) | 22 (6.0) | ||
Obese (BMI ≥ 30.0 kg/m2) | 8 (0.7) | 4 (0.5) | 4 (1.1) | ||
GWG, n (%) | 6.665a | 0.036 | |||
Inadequate GWG (1)(4)(7)(10)c | 254 (21.0) | 175 (20.8) | 79 (21.5) | ||
Adequate GWG (2)(5)(8)(11)c | 589 (48.7) | 393 (46.7) | 196 (53.3) | ||
Excessive GWG (3)(6)(9)(12)c | 366 (30.3) | 273 (32.5) | 93 (25.3) |