Table 1.
Distribution on Independent Variables Across Samples With and Without Weights
| Unweighted |
Weighted |
|||||
|---|---|---|---|---|---|---|
| Wave I (11th and 12th) |
Wave I (11th and 12th) |
|||||
| All Wave I | Total | Attrition | Analytical | Total | Analytical | |
| Romantic involvement | ||||||
| Nonsexual romantic relationship | 0.34 | 0.29 | 0.29 | 0.30 | 0.28 | 0.29 |
| Sexual romantic relationship | 0.30 | 0.47 | 0.50 | 0.45* | 0.49 | 0.47 |
| Romantic activities | ||||||
| Went out together in a group | 0.46 | 0.57 | 0.57 | 0.57 | 0.59 | 0.59 |
| Gave or received a gift | 0.48 | 0.61 | 0.63 | 0.60* | 0.62 | 0.61 |
| Met partner’s parents | 0.45 | 0.58 | 0.58 | 0.58 | 0.61 | 0.60 |
| Told others we are a couple | 0.51 | 0.61 | 0.62 | 0.60* | 0.62 | 0.62 |
| Same I love/told I am loved | 0.51 | 0.61 | 0.63 | 0.60* | 0.61 | 0.60 |
| Saw less of friends | 0.32 | 0.42 | 0.43 | 0.42 | 0.43 | 0.43 |
| Went out together alone | 0.48 | 0.63 | 0.64 | 0.62* | 0.64 | 0.64 |
| Held hands | 0.55 | 0.66 | 0.68 | 0.66 | 0.68 | 0.67 |
| Thought of ourselves as a couple | 0.55 | 0.65 | 0.67 | 0.64* | 0.66 | 0.65 |
| Nonromantic sexual relationship | 0.29 | 0.39 | 0.26 | 0.25 | 0.27 | 0.27 |
| Age | 15.7 | 17.4 | 17.4 | 17.30* | 17.4 | 17.4 |
| Female | 0.51 | 0.51 | 0.49 | 0.52* | 0.48 | 0.48 |
| Race-ethnicity | ||||||
| Non-Hispanic White | 0.53 | 0.50 | 0.48 | 0.50* | 0.66 | 0.67 |
| Non-Hispanic Black | 0.21 | 0.19 | 0.19 | 0.19 | 0.16 | 0.16 |
| Mexican origin | 0.09 | 0.10 | 0.09 | 0.11* | 0.07 | 0.07 |
| Other race-ethnicity | 0.17 | 0.21 | 0.24 | 0.20* | 0.11 | 0.11 |
| Family structure | ||||||
| Two biological/adoptive parents | 0.51 | 0.52 | 0.44 | 0.55* | 0.54 | 0.56 |
| Single parent | 0.25 | 0.22 | 0.25 | 0.21* | 0.21 | 0.20 |
| Stepfamily | 0.18 | 0.17 | 0.18 | 0.16* | 0.16 | 0.15 |
| Other family | 0.06 | 0.09 | 0.12 | 0.07* | 0.09 | 0.08 |
| Parental cohabitation | 0.14 | 0.11 | 0.14 | 0.10* | 0.11 | 0.09 |
| Parental education | ||||||
| Less than high school | 0.13 | 0.13 | 0.13 | 0.12 | 0.10 | 0.10 |
| High school | 0.30 | 0.28 | 0.29 | 0.27 | 0.31 | 0.31 |
| More than high school | 0.57 | 0.60 | 0.58 | 0.60 | 0.59 | 0.59 |
| Religious attendance | 0.44 | 0.46 | 0.47 | 0.45* | 0.46 | 0.46 |
| Evangelical christian | 0.27 | 0.25 | 0.24 | 0.25 | 0.26 | 0.27 |
| Opposite-gender friends | 0.77 | 0.80 | 0.78 | 0.81* | 0.82 | 0.83 |
| Grade point average | 2.60 | 2.70 | 2.59 | 2.63* | 2.69 | 2.64 |
| Body mass index | 22.62 | 23.27 | 23.03 | 23.36* | 23.25 | 23.36 |
| Pubertal development | 3.00 | 3.13 | 3.12 | 3.13 | 3.18 | 3.19 |
| Closeness to parents | 4.21 | 4.12 | 4.13 | 4.11 | 4.14 | 4.13 |
| AH-PVT score | 99.95 | 100.99 | 99.20 | 101.65* | 102.69 | 103.26 |
| Self-esteem | 28.50 | 28.29 | 28.36 | 28.27 | 28.43 | 28.42 |
| Popularity | 4.36 | 4.29 | 3.90 | 4.43* | 4.51 | 4.60 |
| Physical attractiveness | 3.56 | 3.61 | 3.62 | 3.61 | 3.62 | 3.61 |
| Same-gender attraction | 0.06 | 0.07 | 0.08 | 0.07 | 0.07 | 0.07 |
| Unweighted n | 18,924 | 6,743 | 1,832 | 4,911 | 6,743 | 4,911 |
Note: AH-PVT = Add Health Peabody Picture Vocabulary Test.
*
Difference between the attrition sample and the analytical sample (unweighted) is statistically significant at p < .05.