Table 1.
Demographics for Youth and Families in the Three Samples
| Variable |
Add Health N = 14428 |
JHU-PIRC N = 2297 |
LIFT (1st Grade Baseline) N = 281 |
LIFT (5th Grade Baseline) N = 314 |
|---|---|---|---|---|
| Gender: boy (%) | 7056 (50.3) | 1148 (50.0) | 128 (45.6) | 157 (50.0) |
| Year 1 age (M [SD]) | -- | 6.32 (0.45) | 6.77 (0.44) | 10.51 (0.51) |
| Year 1 grade level (%) | ||||
| 1 | 2297 (100) | 281 (100) | ||
| 5 | 314 (100) | |||
| 7 | 2234 (20.4) | |||
| 8 | 2259 (19.6) | |||
| 9 | 2883 (20.2) | |||
| 10 | 3231 (18.9) | |||
| 11 | 3098 (17.5) | |||
| 12 | 644 (3.4) | |||
| Race/ethnicity (%) | ||||
| White | 7777 (68.6) | 757 (33.0) | 236 (84.0) | 272 (86.6) |
| African American | 3142 (15.6) | 1504 (65.5) | 7 (2.5) | 4 (1.3) |
| Asian | 969 (3.9) | 7 (0.3) | 5 (1.8) | 7 (2.2) |
| Native American | 124 (0.8) | 21 (0.9) | 7 (2.5) | 11 (3.5) |
| Hispanic | 2142 (11.0) | 8 (0.3) | 18 (6.4) | 12 (3.8) |
| Parent education (% <12 years) | 2227 (16.8) | 481 (33.3) | 48 (17.8) | 35 (11.2) |
| Family income (% <$20k) | 2737 (24.8) | 770 (56.2) | 108 (38.8) | 86 (27.7) |
| Intervention status (% in experimental group) | -- | 968 (42.2) | 151 (53.7) | 185 (58.9) |
Note. Ns reflect the number of youth in each sample who had at least one year of valid absenteeism data and a corresponding proceeding year of valid psychopathology data. Percentages given for each variable reflect the proportion of cases relative to the valid n (nonmissing cases) for the variable. For the Add Health sample, frequencies are raw but corresponding percentages are weighted.