Sociodemographic variables distribution, IAL cases and controls, Brazil, 1999-2005
Cases (n = 202), n (%) | Controls (n = 440), n (%) | P | ||||
---|---|---|---|---|---|---|
Age at hospitalization (mo) | ||||||
0-15 | 103 (51.0) | 262 (59.5) | 0.04 | |||
16-21 | 99 (49.0) | 178 (40.5) | ||||
Sex | ||||||
Male | 100 (49.6) | 233 (53.0) | 0.488 | |||
Female | 102 (50.4) | 207 (47.0) | ||||
Race (skin color)* | ||||||
White | 106 (52.5) | 156 (35.6) | 0.004 | |||
Intermediate | 58 (28.7) | 142 (32.2) | ||||
Black | 38 (18.8) | 142 (32.2) | ||||
Maternal age (y) | ||||||
<18 | 4 (2.0) | 39 (8.9) | 0.002 | |||
18-24 | 66 (32.7) | 185 (42.0) | ||||
25-34 | 99 (49.0) | 162 (36.8) | ||||
>35 | 33 (16.3) | 54 (12.3) | ||||
Population density (residence area) | ||||||
<10,000 | 11 (5.4) | 18 (4.0) | 0.001 | |||
10,000-39,999 | 28 (13.9) | 36 (8.2) | ||||
40,000-99,999 | 27 (13.4) | 52 (11.9) | ||||
100,000-499,000 | 50 (24.8) | 83 (18.9) | ||||
500,000-1,000,000 | 18 (8.9) | 39 (8.9) | ||||
>1,000,000 | 68 (33.7) | 212 (48.1) | ||||
Geographic origin in Brazil | ||||||
Southeast | 117 (57.9) | 251 (57.1) | 0.001 | |||
Northeast | 51 (25.2) | 104 (23.6) | ||||
South | 24 (11.9) | 51 (11.6) | ||||
Central plateau | 10 (5.0) | 34 (7.7) | ||||
Mother education (y) | ||||||
<4 | 104 (51.5) | 208 (47.2) | 0.001 | |||
5-9 | 74 (36.6) | 198 (45.0) | ||||
≥10 | 24 (11.9) | 34 (7.7) | ||||
Monthly family income† | ||||||
<400 | 99 (49.0) | 276 (62.7) | 0.001 | |||
400-999 | 50 (24.8) | 111 (25.2) | ||||
1,000-1,999 | 35 (17.3) | 42 (9.5) | ||||
≥2,000 | 18 (8.9) | 11 (2.5) |