Table 3.

Adjusted odds ratios for maternal and infant characteristics, Ontario 1994-2009.

Variables	Levels	Adjusted OR	95% CI
Sex	Female vs. Male	0.88	0.83–0.94
Time era	Pre 1999 vs. After 1999	1.06	1.00–1.24
Maternal age	<20 vs. 20–29 years	1.33	1.16–1.51
	30–39 vs. 20–29 years	1.01	0.95–1.07
	≥40 vs. 20–29 years	1.29	1.05–1.59
Income quintile	1 vs. 5	1.20	1.08–1.33
	2 vs. 5	1.08	0.97–1.20
	3 vs. 5	1.06	0.91–1.12
	4 vs. 5	0.96	0.87–1.07
University degree	1 vs. 5	1.17	1.05–1.30
	2 vs. 5	1.14	1.03–1.26
	3 vs. 5	1.05	0.95–1.16
	4 vs. 5	1.07	0.97–1.18