Table 2.

Age- and gender-adjusted Incidence rate ratios (IRR_adj) of any psychotic disorder for reference populations and for different migrant and minority ethnic groups (‘minorities’), compared to the corresponding category in Amsterdam

	Reference population	Minorities, all	Minorities, Western countriesa	Minorities, non-Western countriesb
	IRRadj (95% CI)	IRRadj (95% CI)	IRRadj (95%-CI)	IRRadj (95% CI)
London	1.33 (0.92–1.92)	1.24 (0.99–1.54)	0.85 (0.51–1.44)	1.40 (1.10–1.79)
Cambridge	0.51 (0.37–0.69)	0.44 (0.33–0.57)	0.56 (0.35–0.91)	0.44 (0.31–0.62)
Amsterdam	1.00	1.00	1.00	1.00
Gouda & Voorhout	0.84 (0.62–1.16)	0.59 (0.40–0.87)	0.50 (0.22–1.13)	0.66 (0.43–1.01)
Barcelona	0.49 (0.34–0.70)	0.21 (0.13–0.33)	0.25 (0.11–0.57)	0.21 (0.12–0.35)
Valencia	0.70 (0.47–1.05)	0.22 (0.10–0.45)	0.09 (0.01–0.78)	0.27 (0.13–0.58)
Oviedo	0.64 (0.44–0.93)	0.64 (0.35–1.16)	0.54 (0.15–1.89)	0.71 (0.37–1.37)
Santiago	0.28 (0.18–0.44)	0.0 (–)	0.0 (–)	0.0 (–)
Cuenca	0.54 (0.31–0.92)	0.31 (0.13–0.71)	0.18 (0.04–0.82)	0.72 (0.28–1.89)
Paris	1.25 (0.86–1.82)	1.37 (0.99–1.89)	0.76 (0.25–2.28)	1.51 (1.04–2.17)
Val de Marne	1.42 (1.03–1.94)	0.87 (0.64–1.17)	0.47 (0.16–1.41)	0.91 (0.65–1.26)
Bologna	0.74 (0.53–1.02)	0.49 (0.35–0.69)	0.52 (0.27–1.00)	0.52 (0.35–0.78)
Palermo	0.44 (0.33–0.60)	0.40 (0.24–0.65)	0.40 (0.13–1.22)	0.39 (0.23–0.68)
Comparison between sitesc	174⋅2/ 12/ <0.001	157⋅8/ 12/ <0.001	23.5/ 12/ 0.0235	120/ 12/ <0.001

^aIncluding Europe, USA, Canada, USA, Australia, New Zealand and countries of the former Soviet Union, except states in Asia with a predominantly Islamic population.

^bMiddle East, The Maghreb, sub-Saharan Africa, Asia, The Caribbean (including French oversees departments), Latin America.

^cWald χ² statistic/ df/ p value.