Investigating social deprivation and comorbid mental health diagnosis as predictors of treatment access among patients with an opioid use disorder using substance use services: a prospective cohort study

Table 3 Re-engagement rates with substance use services in the one-year follow-up period

	Unadjusted regression			Partially adjusted regression ^a			Fully adjusted regression^b
	IRR	95% CI	p-value	IRR	95% CI	p-value	IRR	95% CI	p-value
Social deprivation
Q1 (least deprived)	1			1			1
Q2	1.17	[0.79,1.79]	0.5	1.17	[0.79,1.79]	0.5	1.13	0.75, 1.76	0.6
Q3 (most deprived)	1.12	[0.77,1.69]	0.6	1.12	[0.77,1.70]	0.6	1.09	0.73, 1.70	0.7
no LSOA	1.12	[0.72,1.76]	0.6	1.08	[0.70,1.71]	0.7	1.09	0.61, 1.98	0.8
Recorded mental health comorbidity
No recorded diagnosis	1			1			1
One recorded mental health diagnosis	1.16	[0.61,2.01]	0.60	1.18	[0.62,2.05]	0.60	1.00	[0.49,1.85]	> 0.9
Non-opioid substance use diagnosis	1.31	[1.04,1.67]	0.024	1.32	[1.04,1.68]	0.023	1.25	[0.97,1.61]	0.087
Multiple recorded diagnosis	1.19	[0.82,1.68]	0.40	1.18	[0.81,1.68]	0.40	1.20	[0.81,1.73]	0.4

^a Partially adjusted for the other exposure variable
^b Fully adjusted for the other exposure and confounders (age, sex, ethnicity, marital status, population density, and social fragmentation)
^c fully colinear with no LSOA group

ISSN: 1747-597X