Table 1.

Districts and populations of Recife, Brazil in 2010 stratified according to the living conditions

Strata	Districts (n)	Population	%	Strata Centrea
1	14	205,926	13.5	22.2
2	10	100,351	6.6	40.0
3	30	533,540	35.1	68.1
4	40	680,762	44.8	88.0
Total	94	1,520,579	100	–

^aFinal strata Centres (% of heads of households with an income below twice the minimum wage) in the K-means analysis; df = 3; F = 570.6; P < 0.0001