Table 2

Characteristics of GDM-unscreened and -screened women

Descriptive analysisMultivariable logistic regression model for GDM screening
VariableGDM-unscreened pregnanciesGDM-screened pregnanciesP*Odds ratio (95% CI)P**
Birth events, n5,53881,304
Demographics
 Maternal age, 1-year increments1.05 (1.05, 1.06)<0.001
  Mean (SD)25.8 (5.6)27.6 (5.4)<0.001
  Median (IQR)26 (21, 30)28 (24, 31)<0.001
 ≥35 years384 (6.9)8,433 (10.4)<0.001
 Urban residence4,581 (82.7)71,036 (87.4)<0.0011.08 (1, 1.17)0.041
MHI, $10,000 increments1.07 (1.05, 1.08)<0.001
 Mean (SD)$66,285 ($19,376)$69,709 ($19,947)<0.001
 Median (IQR)$61,176 ($54,929, $77,410)$65,147 ($55,510, $81,276)<0.001
Prepregnancy weight<0.001
 ≤45 kg42 (0.8)644 (0.8)1.15 (0.84, 1.58)0.372
 46–90 kg5,142 (92.8)73,322 (90.2)1
 ≥91 kg354 (6.4)7,338 (9.0)1.43 (1.28, 1.60)<0.001
Risk factors as reported on antepartum risk assessment (APHP)
 Any medical disorders368 (6.6)7,536 (9.3)<0.0011.34 (1.2, 1.49)<0.001
 Heart19 (0.3)383 (0.5)0.175
 Hypertension31 (0.6)690 (0.8)0.022
 Chronic renal disease2 (0.0)88 (0.1)0.107
 Other medical disorders324 (5.9)6,610 (8.1)<0.001
 Smoking1,200 (21.7)11,464 (14.1)<0.0010.75 (0.70, 0.80)<0.001
  • *P value for comparison of GDM-screened and -unscreened pregnancies.

  • **P value for testing that odds ratio equals one.