Table 1.
Sample characteristics.
| Measures | Females (n = 21) Mean (SD) |
Males (n = 59) Mean (SD) |
|---|---|---|
| Demographics | ||
| Age | 15.81 (1.17) | 15.98 (1.18) |
| Ethnicity (% Hispanic) | 61.9 | 47.4 |
| Years of Education (Last Grade Completed) | 9.14 (1.39) | 9.12 (1.02) |
| Total Scale Scores | ||
| Impulsive Sensation Seeking (IMPSS) | 12.71 (2.51) | 11.49 (3.59)a |
| Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ) | 24.24 (6.38) | 22.00 (6.94) |
| Substance Use | ||
| Age of first alcohol use | 12.55 (1.50)b | 12.19 (2.34)c |
| Age of first marijuana use | 12.05 (2.42) | 11.24 (2.28) |
| Past 3 months alcohol use frequency† | 3.10 (2.05) | 3.19 (2.14) |
| Past 3 months alcohol use quantity (drinks)‡ | 3.52 (1.97) | 3.36 (2.02) |
| Past 3 months marijuana use frequency† | 5.76 (3.69) | 4.86 (3.54) |
| Past 3 months marijuana use quantity (hits)‡ | 5.10 (3.51) | 5.51 (3.50) |
a
n = 53;
b
n = 20;
c
n = 58
†
1=“Never,” 2=“Occasionally,” 3=“Once a month,” 4=“2–3 times a month,” 5=“4–5 times a month,” 6=“Once a week,” 7=“2–3 times a week,” 8=“4–5 times a week,” 9=“Every day.”
‡
1=“None,” 2=“1,” 3=“2–3,” 4=“4–6,” 5=“7–9,” 6=“10–12,” 7=“13–15,” 8=“16–18,” 9=“19–20,” 10=“More than 20.”