Table 1.
Baseline Characteristics by Gestational Diabetes Mellitus Screening Groups
| Characteristic |
GDM screening groupa |
|||
|---|---|---|---|---|
| Early only (n = 280) |
Early plus Usualb(n = 1,124) |
Usual only (n = 3,987) |
pc |
|
| n (%) | n (%) | n (%) | ||
| Prepregnancy BMI | ||||
| <18.5 | 1 (0.4) | 13 (1.2) | 165 (4.1) | <0.0001 |
| 18.5–24.9 | 35 (12.5) | 198 (17.6) | 2,072 (52.0) | |
| 25.0–29.9 | 66 (23.6) | 233 (20.7) | 1,168 (29.3) | |
| 30+ | 178 (63.6) | 680 (60.5) | 582 (14.6) | |
| Maternal age | <0.0001 | |||
| ≤25 | 46 (16.4) | 252 (22.4) | 1,200 (30.1) | |
| 26–30 | 54 (19.3) | 316 (28.1) | 1,173 (29.4) | |
| 31–35 | 91 (32.5) | 308 (27.4) | 1,079 (27.1) | |
| 36+ | 89 (31.8) | 248 (22.1) | 535 (13.4) | |
| Race | ||||
| Nonwhite | 264 (94.3) | 979 (87.1) | 3,170 (79.5) | <0.0001 |
| White | 14 (5.0) | 143 (12.7) | 798 (20.2) | |
| Unknownd | 2 (0.7) | 2 (0.2) | 19 (0.5) | |
| Parity | ||||
| 0 | 86 (30.7) | 341 (30.3) | 1,640 (41.1) | <0.0001 |
| 1 | 77 (27.5) | 392 (34.9) | 1,241 (31.1) | |
| 2 | 60 (21.4) | 211 (18.8) | 657 (16.5) | |
| 3+ | 57 (20.4) | 177 (15.8) | 443 (11.1) | |
| Unknownd | 0 | 3 (0.3) | 6 (0.2) | |
| Insulin use (among GDM only) | ||||
| No. with GDM | 140 | 155 | 282 | |
| Insulin | 82 (58.6) | 51 (32.9) | 70 (24.8) | <0.0001 |
| No insulin | 58 (41.4) | 104 (67.1) | 212 (75.2) | |
| Baby gender | ||||
| Male | 142 (50.7) | 568 (50.5) | 2,044 (51.3) | 0.9027 |
| Female | 138 (49.3) | 556 (49.5) | 1,943 (48.7) | |
a
The overall mean gestational ages for GDM screening were 10.1 weeks (Early) and 28.3 weeks (Usual).
b
Some high-risk women had EarlyGDM screening and if screen negative, also had UsualGDM screening later in pregnancy (Early and Usual).
c
The p-value is based on Mantel–Haenszel test for trend for ordered measures and chi square for categorical measures.
d
“Unknown” groups for race and parity were not included in p-value calculations.
GDM, gestational diabetes mellitus.