Table.
Descriptive statistics by race
| Black N=994 |
White N=756 |
Black versus White | |||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Age 16: Public assistance (n=1501) | 443 | 50.9 | 109 | 17.3 | X2(df=1)=177.1, p<.01 |
| Mean (SD) | Mean (SD) | ||||
| Age at onset: Sex with a male (n=1339) | 16.6 (1.9) | 17.2 (1.8) | t(df=1210.5)=6.0, p<.01 | ||
| STI reported (past year) | n | % | n | % | |
| Age 16 (n=1488) | 35 | 4.0 | 7 | 1.1 | X2(df=1)=11.1, p<.01 |
| Age 17 (n=1472) | 37 | 4.3 | 8 | 1.3 | X2(df=1)=10.3, p<.01 |
| Age 18 (n=1507) | 51 | 5.7 | 7 | 1.1 | X2(df=1)=20.6, p<.01 |
| Sexual Risk Behavior Score | Mean (SD) | Mean (SD) | |||
| Age 16 (n=1485) | 0.7 (1.0) | 0.4 (0.7) | t(df=1476.0)= −5.8, p<.01 | ||
| Age 17 (n=1474) | 0.8 (1.0) | 0.6 (0.8) | t(df=1415.8)= −5.0, p<.01 | ||
| Age 18 (n=1513) | 1.0 (0.9) | 0.9 (0.9) | t(df=1511.0)= −3.0, p<.01 | ||
| Alcohol use (past year) | Mean (SD) | Mean (SD) | |||
| Age 16 (n=1489) | 0.4 (1.0) | 0.8 (1.2) | t(df=1155.7)= 6.4, p<.01 | ||
| Age 17 (n=1472) | 0.6 (1.1) | 1.1 (1.4) | t(df=1107.9)= 8.2, p<.01 | ||
| Marijuana use (past year) | Mean (SD) | Mean (SD) | |||
| Age 16 (n=1488) | 0.7 (1.7) | 0.5 (1.3) | t(df=1482.0)= −3.5, p<.01 | ||
| Age 17 (n=1472) | 0.9 (1.9) | 0.6 (1.5) | t(df=1449.4)= −3.1, p<.01 | ||
| Psychopathology | Mean (SD) | Mean (SD) | |||
| Age 16 Depression (n=1489) | 7.1 (4.8) | 7.0 (4.9) | ns | ||
| Age 16 Conduct Problems (n=1491) | 1.5 (2.3) | 1.1 (1.9) | t(df=1463.9)= −3.5, p<.01 | ||
Notes: STI= sexually transmitted infection. STI includes chlamydia, gonorrhea, and trichomoniasis. ns=not statistically significant (p≥.05).
Between-group comparisons were conducted on unadjusted means and proportions.