Table 7.

Logistic regression model to explore predictors of Knowledge (Multivariate analysis).

Characteristics	p Value	OR	95% CI for OR
Yemen country	0.028	0.088	0.010	-	0.774
Years of experience
1–2 years	……	Reference
2–4 years	0.454	2.093	0.303	-	14.464
4–6 years	0.509	1.924	0.276	-	13.409
more than 6 years	0.546	0.579	0.098	-	3.408
Having any friends or relatives who faced problems in using drugs	0.384	1.383	0.667	-	2.867

OR = odds ratio, CI = confidence interval. A Logistic regression model adjusted for Yemen country, and years of experience for exploring the in depth knowledge and showed that Yemen country had a significant deep knowledge (p = 0.028, OR = 0.088). From 2 to 4 years of experience had the highest odds (OR = 2.093, CI = 0.303–14.464). Participants who had more than six years of experience had the lowest odds (OR = 0.579, CI = 0.098–3.408).