Table 1. Patients baseline characteristics.
| Total Sample (N = 357) | Study group | Control vs. Metformin P Value | ||
|---|---|---|---|---|
|
| ||||
| Control (N = 186) | Metformin (N = 171) | |||
| Age (SD) | 29.1 (6.2) | 29.6 (6.1) | 28.6 (6.2) | 0.12* |
| Ethnicity | ||||
| White | 279 (78.2) | 140 (75.3) | 139 (81.3) | 0.38** |
| Black | 47 (13.2) | 28 (15.1) | 19 (11.1) | |
| Other | 31 (8.7) | 18 (9.7) | 13 (7.6) | |
| Marital status | ||||
| Single | 58 (16.2) | 26 (14.0) | 32 (18.7) | < 0.01** |
| Married | 259 (72.5) | 147 (79.0) | 112 (65.5) | |
| Other | 40 (11.2) | 13 (7.0) | 27 (15.8) | |
| Education | ||||
| < 18 years | 50 (14.0) | 24 (12.9) | 26 (15.2) | 0.23** |
| Middle school | 105 (29.4) | 50 (26.9) | 55 (32.2) | |
| High school | 166 (46.5) | 88 (47.3) | 78 (45.6) | |
| College | 36 (10.1) | 24 (12.9) | 12 (7.0) | |
| Number of pregnancies (SD) | 2.7 (2.0) | 2.7 (2.0) | 2.6 (2.0) | 0.73* |
| Intake GA (SD) | 11.4 (3.2) | 11.3 (3.1) | 11.5 (3.2) | 0.62* |
| Gestational BMI (≥ 30 kg/m2) (SD) | ||||
| Intake BMI | 37.4 (5.2) | 37.2 (5.7) | 37.5 (4.6) | 0.26*** |
| 3rd Trimester BMI | 38.8 (6.2) | 38.9 (6.3) | 38.7 (6.1) | 0.33*** |
SD: standard deviation; GA: gestational age; BMI: body mass index. Statistical tests: *T test; **Chi-square. ***Mann-Whitney.