Table 2:

Trends and prevalence of past-year cannabis use among all women of reproductive age (15–44 yr) and women reporting a pregnancy in the past 5 years, by respondent characteristics with crude and adjusted ORs, 2004–2017

	All women 15–44 yr n = 90 037			Women pregnant in past 5 yr n = 2414
	Prevalence, % (95% CI)	OR (95% CI)	Adjusted OR (95% CI)*	Prevalence, % (95% CI)	OR (95% CI)	Adjusted OR (95% CI)*
Trend
All years		1.03 (1.02–1.05)	1.05 (1.03–1.07)		–	–
2008–2012†		0.96 (0.92–1.01)	0.98 (0.93–1.03)		1.12 (0.90–1.39)	1.18 (0.98–1.43)
Age, yr
15–24	20.9 (20.0–21.7)	4.50 (3.96–5.10)	7.21 (6.26–8.30)	20.3 (12.1–32.1)	6.05 (2.54–14.39)	3.50 (1.29–9.52)
25–34	11.4 (10.4–12.5)	2.20 (1.89–2.57)	2.23 (1.89–2.62)	9.3 (6.8–12.5)	2.43 (1.21–4.88)	1.83 (0.88–3.79)
35–44	5.5 (5.0–6.2)	1.00 (Ref.)	1.00 (Ref.)	4.0 (2.2–7.2)	1.00 (Ref.)	1.00 (Ref.)
Education
Less than high school	16.5 (15.2–17.9)	2.61 (2.24–3.05)	0.97 (0.81–1.15)	21.6 (10.8–38.4)	6.58 (2.36–18.33)	2.52 (0.91–6.96)
Completed high school	14.8 (13.8–15.9)	2.30 (1.99–2.66)	1.09 (0.93–1.27)	13.7 (8.8–20.7)	3.80 (1.70–8.47)	1.68 (0.68–4.20)
Completed college	12.5 (11.6–13.5)	1.88 (1.63–2.18)	1.17 (1.00–1.37)	10.6 (7.4–15.1)	2.85 (1.35–6.01)	2.10 (0.98–4.52)
Completed university	7.0 (6.3–7.9)	1.00 (Ref.)	1.00 (Ref.)	4.0 (2.2–7.3)	1.00 (Ref.)	1.00 (Ref.)
Tobacco smoking
Current smoker	29.8 (28.2–31.6)	4.89 (4.41–5.43)	6.90 (6.13–7.76)	27.6 (19.4–37.6)	9.88 (5.13–19.03)	7.90 (4.04–15.46)
Former smoker	12.8 (11.6–14.2)	1.69 (1.48–1.94)	3.11 (2.65–3.64)	11.5 (7.6–17.2)	3.38 (1.75–6.54)	3.34 (1.66–6.69)
Never smoker	8.0 (7.5–8.5)	1.00 (Ref.)	1.00 (Ref.)	3.7 (2.4–5.8)	1.00 (Ref.)	1.00 (Ref.)

Note: CI = confidence interval, OR = odd ratios, Ref. = reference category.

^*Mutually adjusted model, includes terms for time trends, age, education and tobacco smoking.

^†Pregnancy data available only between 2008 and 2012.