No (%) cases (n=45) | No (%) controls (n=50) | |
---|---|---|
*Cases and controls were frequency matched by age and gender, but were not matched by self reported ethnicity or race. | ||
†χ2 p<0.004. | ||
Age (years) | ||
11–13 | 9 (20) | 14 (28) |
14–18 | 36 (80) | 36 (72) |
Sex | ||
Male | 40 (89) | 44 (88) |
Female | 5 (11) | 6 (12) |
Race/ethnicity† | ||
African-American | 22 (49) | 7 (14) |
Hispanic | 20 (44) | 39 (78) |
Other | 3 (7) | 4 (8) |