Table 2.

Two logistic regressions modeling predictors of inadequate prenatal care, entering MA exposure and continuous measures of other drug use (model 1) and MA exposure, continuous measures of additional substance use, and maternal sociodemographic factors as predictors (model 2)

Predictors	US			NZ
	P value	Odds ratio	95th C.I.	P value	Odds ratio	95th C.I.
Model 1: substance use variables
Methamphetamine exposure	<0.001	4.63	2.08–10.32	0.345	1.87	0.51–6.87
# Of cigarettes per day-renatal	0.064	1.04	0.10–1.08	0.637	1.02	0.94–1.11
oz. Of absolute alcohol per day-prenatal	0.157	2.00	0.77–5.25	0.529	0.69	0.22–2.18
# Of joints per day- prenatal	0.820	0.85	0.22–3.37	0.191	1.48	0.82–2.65
Model 2: substance use variables and maternal sociodemographics
Methamphetamine exposure	0.600	1.31	0.48–3.60	0.521	1.65	0.36–7.55
# Of cigarettes per day-prenatal	0.390	1.02	0.98–1.07	0.860	0.99	0.90–1.09
oz. Of absolute alcohol per day-prenatal	0.277	1.69	0.66–4.37	0.424	0.64	0.21–1.93
# Of joints per day-prenatal	0.501	1.70	0.36–7.90	0.413	1.30	0.69–2.45
Minority status	0.944	0.97	0.44–2.17	0.166	2.73	0.66–11.31
SES	0.339	0.98	0.94–1.02	0.062	0.90	0.81–1.01
Maternal age (years)	0.472	0.98	0.92–1.04	0.453	1.04	0.94–1.14
No partner	0.195	1.60	0.79–3.18	0.871	1.12	0.28–4.43
Child protective services referral	<0.001	7.15	2.75–18.60	0.311	0.40	0.07–2.37

Bold values indicate significant findings (P <0.05)