Table 1.
Demographic and Clinical Variables by Participant Sex
| Girls (n=99) |
Boys (n=84) |
t or χ2 | |
|---|---|---|---|
| Age Wave 1 | 11.00 (1.03) | 11.85 (0.93) | −5.81*** |
| Pubertal Stage Wave 1 | 2.06 (0.73) | 1.95 (0.67) | 0.98 |
| Race/Ethnicity | 5.50 | ||
| White/Caucasian | 33% | 42% | |
| African American | 9% | 7% | |
| Hispanic | 9% | 13% | |
| Asian | 10% | 14% | |
| Native American | 2% | 1% | |
| Pacific Islander | 2% | 0% | |
| Other | 31% | 19% | |
| No response given | 3% | 2% | |
| Family Incomea | 1.94 | ||
| Less than $25,000 | 8% | 4% | |
| $25,001-$75,000 | 15% | 17% | |
| $75,001-$150,000 | 34% | 35% | |
| More than $150,000 | 36% | 37% | |
| No response given | 6% | 8% | |
| Income-to-Needs Ratioa | 1.29 (0.56) | 1.34 (0.51) | −0.60 |
| Irritability Wave 1 | 3.39 (2.70) | 3.31 (2.77) | 0.19 |
| Externalizing Symptoms Wave 1 | 9.05 (7.22) | 10.57 (6.39) | −1.48 |
| Internalizing Symptoms Wave 1 | 13.53 (10.26) | 11.29 (8.06) | 1.63 |
| Age Wave 2 | 12.91 (0.98) | 13.82 (0.96) | −4.93*** |
| Pubertal Stage Wave 2 | 3.40 (0.79) | 3.49 (0.95) | −0.56 |
| Irritability Wave 2b | 3.02 (2.55) | 3.02 (2.55) | 1.04 |
| Externalizing Symptoms Wave 2 | 7.90 (5.86) | 9.45 (6.14) | −1.37 |
| Internalizing Symptoms Wave 2 | 10.41 (8.67) | 9.04 (8.30) | 0.85 |
Note. M (SD) or %.
***
p<.001.
a
Available n=170.
b
At Wave 2, n=59 girls and n=53 boys.