Table 1 Sample characteristics in Recife, Curitiba and Vitória, Brazil, 2007-2009.

Sampling

criteria

Eligible respondents

3632

3406

2690

Random sample

2400 households with at least 1 telephone landline from each stratum, 12 clusters of 200 telephone numbers each.

1000 people distributed across 9 strata and 1000 distributed in 4 extreme SES** strata.

Stratified according to presence or not of SOE* modules in the neighborhood

Final sampling

2046

2097

2023

Response rates

64,5%

60,5%

75,2%

Environmental characteristics

Population

1,561,659

1,851,215

320,156

Automobile fleet (units)

307,166

867,066

109,305

Inhabitants/cars

5.1

2.1

2.9

Crimes (Homicides/100,000 inhabitants)

87.5

45.5

75.4