Table 4.

Negative Binomial Regression using Multilevel Modeling on Medication Use for Patients Diagnosed with PTSD in Mental Health or Primary/Other Care Clinics (Patients nested within site as random effect)

Variable	Incident Rate Ratio	95% CI	p value
Mental Health Care	1.48	1.31 – 1.67	<.0001
Age	1.17	1.13 – 1.21	<.0001
Female	1.16	1.05 – 1.28	.0002
Dyslipidemia	1.09	0.97 – 1.22	0.20
Hypertension	1.01	0.9 – 1.14	0.90
Anxiety	1.51	1.38 – 1.65	<.0001
Depression	1.42	1.29 – 1.56	<.0001
Substance Use Disorder	1.20	1.08 – 1.35	0.002
Bipolar disorder	1.51	1.32 – 1.73	<.0001

Note: Reference group is patients diagnosed with PTSD in primary/other care. The intraclass correlation coefficient for the effect of site was ICC = 0.30.