. Author manuscript; available in PMC: 2019 Sep 3.

Published in final edited form as: J Subst Abuse Treat. 2019 Mar 15;101:12–17. doi: 10.1016/j.jsat.2019.03.002

Table 3.

Odds Ratios of Concordance Between Timeline Follow-back (TLFB) and the Saliva Toxicological Test across Substance Groups at Baseline, 6 months, and 12 Months

Time Point		Substance Group (OR, 95% CI)
		Marijuana		Cocaine		Amphetamine, Methamphetamine, PCP
	Baseline	11.02	(6.59, 18.42)	39.35	(16.22, 95.48)	77.30	(24.58, 243.11)
	6-Month	22.55	(11.45, 44.42)	9.49	(3.05, 29.57)	0.96	(0.11, 8.08)
	12-Month	372.00	(48.72, 2840.18)	11.18	(2.87, 43.57)	54.50	(10.65, 278.79)
Breslow-Day Test for Homogeneity of the Odds Ratio df = 2		Chi-Square	p-value	Chi-Square	p-value	Chi-Square	p-value
		18.94	<.01	5.12	0.08	22.66	<.01