Age (years) | 24.1 ± 4.9 | 27.7 ± 5.2 | <.01 |
Gestation (weeks) | | | |
First analysis | 8.5 ± 2.3 | 8.4 ± 2.3 | 0.79 |
Second analysis | 26.8 ± 2.6 | 25.0 ± 4.5 | .03 |
Parity (n [%]) | | | 0.06 |
0 | 142 (35.9) | 12 (41.4) | |
1 | 115 (29.0) | 4 (13.8) | |
2 | 90 (22.7) | 5 (17.2) | |
3 or more | 49 (12.4) | 8 (27.6) | |
Race (n [%]) | | | 0.87 |
Caucasian | 219 (55.6) | 14 (48.3) | |
African-American | 171 (43.4) | 14 (48.3) | |
Other | 4 (1.0) | 1 (3.4) | |
Education (n [%]) | | | 0.72 |
<High school | 130 (32.8) | 8 (27.6) | |
High school | 154 (38.9) | 13 (44.8) | |
Some college | 86 (21.7) | 5 (17.2) | |
College graduate | 22 (5.6) | 3 (10.3) | |
Graduate school | 4 (1.0) | 0 (0.0) | |
Smoker (n [%]) | | | 0.93 |
Yes | 229 (57.8) | 17 (58.6) | |
No | 167 (42.2) | 12 (41.4) | |
History of gestational diabetes (n [%]) | | | <.01 |
Yes | 12 (3.0) | 7 (24.0) | |
No | 384 (97.0) | 22 (76.0) | |
Family history/gestational diabetes (n [%]) | | | .09 |
Yes | 44 (11.3) | 6 (22.2) | |
No | 346 (88.7) | 21 (77.8) | |
Chromium level (ng/mL) | | | |
Initial (8 weeks’ gestation) | 0.15 (0.06) | 0.14 (0.03) | .28 |
Follow-up (26 weeks’ gestation) | 0.14 (0.06) | 0.14 (0.04) | .82 |