From: Distance matters: a population based study examining access to maternity services for rural women
 | Perinatal Mortality N = 49,402 | Prematurity N = 49,402 | NICU 2 Admissions N = 36,805 | |||
---|---|---|---|---|---|---|
 | OR | 95% CI | OR | 95% CI | OR | 95% CI |
Step 1: Maternal Risk Factors | Â | Â | Â | Â | Â | Â |
   Maternal Age < 16 or > 35 | 1.62 | (1.23, 2.14) ** | 1.25 | (1.14, 1.38) *** | 1.22 | (1.03, 1.45)* |
   Nulliparity | 1.38 | (1.09, 1.72) ** | 1.33 | (1.24, 1.45) *** | 1.40 | (1.23, 1.58) *** |
   Previous stillbirth | 2.68 | (1.30, 5.54) ** | NA | NA | NA | NA |
   Previous neonatal death | 2.25 | (0.81, 6.18) | NA | NA | NA | NA |
   Previous premature birth | NA | NA | 4.49 | (4.00, 5.03) *** | NA | NA |
   Antepartum hemorrhage > 20 wks | 8.29 | (5.51, 12.44) *** | 7.50 | (6.23, 9.03) *** | 5.97 | (4.41, 8.10) *** |
   Diabetes (Pre-existing and/or gestational) | 0.79 | (0.42, 1.49) | 1.87 | (1.62, 2.17) *** | 3.17 | (2.57, 3.91) *** |
Step 2: Ecological risk factors | Â | Â | Â | Â | Â | Â |
   Social vulnerability | 1.86 | (1.24, 2.78) ** | 1.12 | (0.99, 1.27) | 8.79 | (6.91, 11.17) *** |
   Proportion Aboriginal | 0.73 | (0.24, 2.24) | 1.18 | (0.79, 1.76) | 0.19 | (0.09, 0.39) *** |
Step 3: Obstetric Service Level | Â | Â | Â | Â | Â | Â |
   Level 1 | 3.17 | (1.45, 6.95) ** | 1.11 | (0.78, 1.59) | 1.07 | (0.54, 2.12) |
   Level 2 | 0.92 | (0.33, 2.53) | 0.94 | (0.70, 1.27) | 0.31 | (0.14, 0.65) *** |
   Level 3 | 1.04 | (0.48, 2.22) | 1.12 | (0.89, 1.41) | 2.20 | (1.59, 3.05) *** |
   Level 4 | 1.44 | (1.08, 1.93)* | 0.85 | (0.77, 0.95) ** | 0.70 | (0.58, 0.85) *** |
   Level 5 | 1.46 | (1.05, 2.03)* | 0.89 | (0.79, 0.99)* | 0.35 | (0.25, 0.50) *** |