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Table 3 Estimated odds ratios for multi-level logistic regression model for intensive care unit admission

From: Variability in intensive care unit admission among pregnant and postpartum women in Canada: a nationwide population-based observational study

Variable Odds ratio (95%CI)
Patient variables
 Maternal comorbidity index 1.88 (1.86–1.99)
Age (years)
 < 15 1.73 (0.76–3.91)
 15–19 1.11 (1.00–1.25)
 20–24 Reference
 25–29 1.04 (0.97–1.12)
 30–34 1.19 (1.11–1.28)
 35–39 1.49 (1.38–1.61)
 40–44 2.22 (2.00–2.48)
 > 44 2.91 (2.24–3.78)
Parity 0.78 (0.76–0.81)
Residence (urban/rural) 1.09 (1.02–1.16)
Transfer between hospitals 13.94 (12.1–13.83)
Income quintile
 1 (lowest) 1.44 (1.34–1.55)
 2 1.28 (1.20–1.39)
 3 1.20 (1.10–1.28)
 4 1.12 (1.03–1.21)
 5 (highest) Reference
Hospital variables
 Hospital (urban versus rural) 1.30 (0.94–1.79)
Groups according to hospital volume of pregnancy
 1 (lowest volume) 12.94 (12.10–13.83)
 2 Reference
 3 1.36 (1.00–1.86)
 4 1.51 (1.10–2.07)
 5 (highest volume) 1.32 (0.96–1.80)
Province
 Newfoundland and Labrador 1.20 (0.76–1.89)
 Prince Edward Island 0.50 (0.18–1.39)
 Nova Scotia 0.70 (0.44–1.13)
 New Brunswick 0.64 (0.41–1.02)
 Ontario Reference
 Manitoba 0.32 (0.21–0.48)
 Saskatchewan 0.60 (0.41–0.87)
 Alberta 0.35 (0.27–0.46)
 British Columbia 0.48 (0.37–0.62)
 Territories 0.37 (0.11–1.23)