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 4 Contact with crisis and inpatient settings 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	0.81	0.21, 2.55	0.7	0.72	0.22, 2.17	0.6	0.85	0.24, 2.81	0.8
Q3 (most deprived)	0.44	0.12, 1.33	0.2	0.77	0.24, 2.30	0.6	0.92	0.25, 3.22	0.9
no LSOA	0.80	0.19, 2.93	0.7	0.79	0.22, 2.70	0.7	0.31	0.06, 1.56	0.2
Recorded mental health comorbidity
No recorded diagnosis	1			1			1
One recorded mental health diagnosis	8.95	2.27, 55.2	0.005	9.08	2.29, 56.0	0.005	8.92	1.81, 64.4	0.007
Non-opioid substance use diagnosis	4.46	2.15, 9.51	< 0.001	4.53	2.14, 9.92	< 0.001	3.91	1.74, 9.14	< 0.001
Multiple recorded diagnosis	17.9	7.18, 50.4	< 0.001	17.9	6.86, 52.3	< 0.001	15.9	5.89, 47.5	< 0.001

^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

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