Table 2

Binary logistic regression analysis of patient and service-related factors associated with whether consent was given, n=1187

Factor	Group	Number in sample	Percentage giving consent (%)	Unadjusted OR	95% CI, p value	Adjusted OR*	95% CI, p value
Age	Age 16–25 years	137	81.0	Reference		Reference
	26–35	226	73.5	0.65	0.39 to 1.09, p=0.10	0.98	0.54 to 1.77, p=0.94
	36–45	242	65.3	0.44	0.27 to 0.73, p=0.001	0.72	0.40 to 1.32, p=0.29
	46–55	329	60.5	0.36	0.22 to 0.58, p<0.001	0.62	0.34 to 1.11, p=0.11
	56–65	148	63.5	0.41	0.24 to 0.70, p=0.001	0.65	0.34 to 1.26, p=0.20
	>65	105	42.9	0.18	0.10 to 0.31, p<0.001	0.28	0.14 to 0.55, p<0.001
Gender	Female	491	64.4	0.94	0.74 to 1.20, p=0.64	0.86	0.65 to 1.13, p=0.27
Gender	Male	696	65.7	Reference		Reference
Ethnicity	White	517	66.5	Reference		Reference
	Asian	59	71.2	1.24	0.69 to 2.25, p=0.47	1.11	0.58 to 2.12, p=0.75
	Black	541	63.0	0.86	0.67 to 1.10, p=0.23	0.73	0.55 to 0.97, p=0.03
	Other ethnic group	70	65.7	0.96	0.57 to 1.63, p=0.89	0.91	0.51 to 1.62, p=0.74
Marital status	Married/cohabiting	116	62.9	0.88	0.59 to 1.32, p=0.54	1.21	0.77 to 1.91, p=0.41
	Divorced/separated	122	60.7	0.80	0.54 to 1.18, p=0.26	1.05	0.67 to 1.65, p=0.83
	Single	941	65.8	Reference		Reference
	Marital status unknown	8	87.5	3.64	0.45 to 29.7, p=0.23	2.88	0.30 to 27.6, p=0.36
Diagnosis	Schizophrenia and related	772	62.7	Reference		Reference
	Schizoaffective	70	62.9	1.01	0.61 to 1.67, p=0.98	1.08	0.62 to 1.87, p=0.80
	Bipolar disorder	85	68.2	1.28	0.79 to 2.06, p=0.32	1.03	0.61 to 1.75, p=0.91
	Psychotic depression	89	75.3	1.81	1.10 to 3.00, p=0.02	1.60	0.92 to 2.77, p=0.10
	Drug-induced psychosis	32	84.4	3.21	1.22 to 8.44, p=0.02	1.69	0.58 to 4.92, p=0.34
	Other psychosis	139	66.9	1.20	0.82 to 1.76, p=0.34	0.99	0.65 to 1.52, p=0.96
Location	Inpatient	240	93.8	10.92	6.38 to 18.7, p<0.001	7.89	4.48 to 13.91, p<0.001
Location	Outpatient	947	57.9	Reference		Reference

*Adjusted for age, gender, ethnicity, marital status, diagnosis, location and clinical service.