Table 2.
Healthy families healthy futures sample characteristics at program entry (percent, unless otherwise noted)
| Characteristic | Treatment mean | Control mean | Difference | Effect size difference | p-Value | Sample size |
|---|---|---|---|---|---|---|
| Age at baseline (years) | 17.40 | 17.34 | 0.06 | 0.04 | 0.743 | 247 |
| Race and ethnicity | 0.260a | |||||
| Hispanic | 65.07 | 61.49 | 3.58 | 0.07 | 248 | |
| Black non-hispanic | 27.30 | 35.51 | − 8.20 | − 0.18 | 242 | |
| Other race, non-hispanic | 4.96 | 2.48 | 2.48 | 0.13 | 242 | |
| Enrolled in school at random assignment | 63.76 | 64.41 | − 0.65 | − 0.01 | 0.916 | 245 |
| Highest grade completed | 0.342a | |||||
| 8th grade or below | 13.60 | 19.01 | − 5.41 | − 0.15 | 246 | |
| 9th grade | 26.34 | 17.41 | 8.93* | 0.22 | 246 | |
| 10th grade | 18.39 | 20.67 | − 2.27 | − 0.06 | 246 | |
| 11th grade | 21.66 | 26.38 | − 4.72 | − 0.11 | 246 | |
| 12th grade | 20.00 | 16.53 | 3.47 | 0.09 | 246 | |
| Ever repeated a grade | 20.15 | 25.01 | − 4.87 | − 0.12 | 0.367 | 244 |
| Ever suspended or expelled | 50.00 | 53.28 | − 3.29 | − 0.07 | 0.607 | 248 |
| In previous 12 months, exposed to information about | ||||||
| Relationships | 6.50 | 15.71 | − 9.21** | − 0.29 | 0.022 | 244 |
| Parenting | 32.20 | 35.30 | − 3.10 | − 0.07 | 0.608 | 246 |
| Child health care | 38.88 | 44.41 | − 5.53 | − 0.11 | 0.376 | 245 |
| Education related services | 28.08 | 39.32 | − 11.25* | − 0.24 | 0.063 | 244 |
| Career counseling or job training | 11.30 | 15.69 | − 4.40 | − 0.13 | 0.316 | 245 |
| Methods of birth control | 44.87 | 64.31 | − 19.43*** | − 0.39 | 0.001 | 248 |
| Percent correct on assessments of knowledge about | ||||||
| Condoms | 50.78 | 47.39 | 3.38 | 0.14 | 0.257 | 248 |
| Birth control pills | 35.21 | 37.98 | − 2.78 | − 0.10 | 0.452 | 248 |
| IUDs | 20.69 | 21.74 | − 1.05 | − 0.04 | 0.726 | 248 |
| Other methods | 24.10 | 23.31 | 0.78 | 0.03 | 0.791 | 248 |
| Use of a LARC first time having sexual intercourse | 0.85 | 0.87 | − 0.02 | 0.00 | 0.988 | 233 |
| Unprotected sex first time having sexual intercourse | 55.44 | 58.52 | − 3.08 | − 0.06 | 0.626 | 244 |
| Would be upset if pregnant again in next 2 years | 3.98 | 9.07 | − 5.08 | − 0.21 | 0.108 | 246 |
Sample sizes differ across characteristics due to missing data. Sample means are regression adjusted and differences are estimated using a regression of the baseline characteristic on the treatment indicator and random assignment strata indicator variables, with standard errors adjusted to account for heteroskedasticity. Effect sizes are calculated using Hedges’ g statistic. An F-test of the null hypothesis that all baseline characteristics jointly predict treatment status has a p-value of .004. Source: Baseline survey
*Significantly different from zero at the .10 level, two-tailed test
**Significantly different from zero at the .05 level, two-tailed test
***Significantly different from zero at the .01 level, two-tailed test
aBaseline differences of these mutually exclusive variables was assessed using an F-test to determine whether baseline characteristics jointly predict treatment status in a regression that also controlled for stratum. Reported p-values are from this test