Table 2. Odds ratios of self-declaring as black (compared to white) according to research centre and total.

ELSA-Brasil, 2008–2010.

	Research Center						Overall, stratified by Black/Brown proportion in the census tracts
Variables	Salvador (n = 502)	Vitória (n = 304)	Belo Horizonte (n = 908)	Rio de Janeiro (n = 1080)	São Paulo (n = 3298)	Porto Alegre (n = 445)	Proportion<60% (n = 5732)	Proportion > = 60% (n = 805)
	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)	OR# (95% CI)
African ancestry (10%)*	3.98 (2.96–5.35)	9.31 (4.11–21.13)	8.98 (5.73–14.07)	4.41 (3.5–5.57)	2.84 (2.61–3.1)	14.12 (6.08–32.81)	3.42 (3.16–3.70)	4.09 (3.30–5.05)
Educational level
(Ref = completed secondary)	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
University or +	0.27 (0.1–0.7)	1.46 (0.28–7.54)	0.42 (0.16–1.07)	0.73 (0.36–1.48)	0.48 (0.33–0.68)	1.12 (0.13–9.72)	0.37 (0.28–0.49)	0.59 (0.29–1.19)
Income (USD)
(Ref = <500.00)	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
501.00 to 1000.00	0.46 (0.16–1.31)	0.7 (0.15–3.26)	1.62 (0.59–4.5)	0.18 (0.08–0.41)	0.66 (0.48–0.92)	0.49 (0.07–3.46)	0.52 (0.39–0.69)	0.69 (0.33–1.44)
>1000.00	0.95 (0.34–2.64)	0.28 (0.04–2.25)	1.49 (0.41–5.4)	0.2 (0.08–0.48)	0.64 (0.4–1.01)	1.03 (0.1–10.66)	0.51 (0.36–0.72)	0.60 (0.25–1.47)
Age (10 years)**	0.61 (0.38–0.97)	1.12 (0.49–2.56)	0.87 (0.55–1.38)	1.09 (0.76–1.56)	1.08 (0.91–1.29)	1.08 (0.46–2.52)	0.96 (0.83–1.11)	1.00 (0.72–1.39)
Sex
(Ref = Male)	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
Female	0.94 (0.42–2.12)	0.92 (0.26–3.25)	0.77 (0.33–1.77)	2.66 (1.26–3.98)	1.17 (0.88–1.53)	1.11 (0.23–5.24)	1.22 (0.97–1.54)	1.08 (0.62–1.89)
Brown/Black proportion (10%)***	1.13 (0.88–1.47)	1.44 (0.92–2.25)	1.07 (0.83–1.39)	1.31 (1.11–1.55)	1.36 (1.25–1.49)	1.32 (0.65–2.68)	-	-

# mutually adjusted

* results for increases of 10% of African ancestry

** results for increases of 10 years of age

***by census tracts