Table 4. Logistic regression coefficients (additive effects on log-odds) for models of the hazard of unintended pregnancy (N=901 individuals, 34,943 observations).
| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| Any pregnancy scare | .99*** (.26) | .79*** (.28) | .73*** (.28) | |
| Sociodemographic Characteristics | ||||
| African American | .41** (.24) | .36+ (.23) | .36+ (.24) | |
| Bio mom <20 years old at 1st birth | .30+ (.22) | .35+ (.22) | .29+ (.22) | |
| Two-parent childhood family structure | -0.12 (.23) | -.16 (.23) | -.07 (.23) | |
| High school GPA | -0.28** (.17) | -.28* (.16) | -.23+ (.17) | |
| Currently receiving public assistance | .35+ (.26) | .36+ (.26) | .34+ (.26) | |
| Living with partner | .58** (.26) | .67** (.26) | .53** (.26) | |
| Adolescent Pregnancy-Related Experiences | ||||
| Age at first sex 16 years or less | .58** (.30) | .55** (.30) | ||
| Two or more sexual partners | .55** (.31) | .56** (.30) | ||
| Ever had sex without birth control | .30 (.27) | .24 (.27) | ||
| 1 or more prior pregnancies | .52** (.27) | 1.31*** (.21) | .85*** (.25) | .52** (.27) |
| Other | ||||
| Time in study | .25*** (.08) | .21*** (.08) | .23*** (.08) | .24*** (.08) |
| Time in study2 | -0.01** (.00) | -.01** (.00) | -.01** (.00) | -.01** (.00) |
| Total number of journals completed | -0.02*** (.00) | -.02*** (.00) | -.02*** (.00) | -.02*** (.00) |
| χ2 | 127.53 | 141.97 | 133.22 | 128.96 |
| Log-likelihood | -731.27 | -746.23 | -736.33 | -728.00 |
Note: Standard errors in parentheses.
+
p < 0.10;
*
p < 0.05;
**
p < 0.01;
***
p < 0.001 (one-tailed tests)