Table 2.

First-Episode Psychosis Incidence Rate Ratios by Ethnic Group, After Multivariable Adjustment

Ethnicity	Unadjusted		Adjustment 1		Adjustment 2		Adjustment 3a
	IRR	(95% CI)	IRR	(95% CI)	IRR	(95% CI)	IRR	(95% CI)
Sample, N	687		687		687		659
White, British	Ref		Ref		Ref		Ref
White, non-British	1.00	(0.78–1.30)	1.21	(0.94–1.56)	1.11	(0.86–1.43)	1.00	(0.77–1.32)
Indian	0.23	(0.06–0.94)	0.27	(0.07–1.09)	0.28	(0.07–1.13)	0.29	(0.07–1.15)
Pakistani	2.77	(1.71–4.49)	2.93	(1.80–4.74)	2.67	(1.65–4.34)	2.31	(1.35–3.94)
Bangladeshi	2.34	(1.05–5.24)	2.34	(1.05–5.23)	2.19	(0.98–4.89)	2.03	(0.90–4.58)
Arabic ethnicities	2.71	(1.01–7.25)	2.51	(0.94–6.71)	2.26	(0.84–6.05)	2.16	(0.80–5.84)
Black, African	4.20	(2.74–6.43)	4.62	(3.04–7.01)	4.21	(2.77–6.41)	4.06	(2.63–6.25)
Black, Caribbean	4.94	(2.56–9.55)	5.16	(2.76–9.66)	4.94	(2.64–9.24)	4.63	(2.38–8.98)
Mixed ethnicities	2.01	(1.37–2.94)	1.89	(1.29–2.77)	1.82	(1.24–2.66)	1.71	(1.15–2.54)
Other ethnicities	0.78	(0.47–1.31)	0.77	(0.46–1.29)	0.73	(0.43–1.22)	0.75	(0.45–1.26)

Note: IRR, incidence rate ratio; 95% CI, 95% confidence interval. Bold denotes P < .05. Adjustment 1: Adjusted for age group, sex, and their interaction. Adjustment 2: Adjustment 1 + socioeconomic status + EIP setting. Adjustment 3: Adjustment 2 + population density + multiple deprivation.

^aTwenty-eight participants of no fixed abode were excluded as they could not be assigned neighborhood-level exposures.