Table 1.
Participant characteristics
| Characteristic | Non-pregnant | Early-pregnant | Late-pregnant | P value |
|---|---|---|---|---|
| N | 25 | 25 | 25 | |
| Age, mean (SD), years | 30 (3) | 29.72 (2.31) | 30.36 (2.66) | 0.6990 |
| Pre-pregnancy BMI, mean (SD), kg/m2 | 20.12 (1.32) | 20.21 (1.48) | 20.39 (2.20) | 0.8511 |
| Gravidity, n (%) | < 0.001*** | |||
| 0 | 7 (28) | 0 (0) | 0 (0) | |
| 1 | 8 (32) | 4 (16) | 15 (60) | |
| ≥2 | 10 (40) | 21 (84) | 10 (40) | |
| Parity, n (%) | 0.0176* | |||
| 0 | 15 (60) | 8 (32) | 19 (76) | |
| 1 | 4 (16) | 9 (36) | 5 (20) | |
| ≥2 | 6 (24) | 8 (32) | 1 (4) | |
| Previous induced abortions, n (%) | 0.2607 | |||
| 0 | 10 (40) | 11 (44) | 16 (64) | |
| 1 | 11 (44) | 10 (40) | 4 (16) | |
| ≥2 | 4 (16) | 4 (16) | 5 (20) | |
| Gestational age, median (Q1, Q3), weeks | 6 (6, 6) | 39.14 (38.79, 39.79) | < 0.001*** |
Comparisons of characteristics among non-pregnant, early-pregnant, and late-pregnant women were assessed using Kruskal-Wallis tests or one-way ANOVA or Mann-Whitney test for continuous variables and chi-squared tests were used for categorical variables. P-values less than 0.05 (P < 0.05) were considered significant. *P < 0.05 and ***P < 0.001. BMI body mass index, SD standard deviation, Q1 the first quartile, Q3 the third quartile