Table 1.
Summary Statistics: National Longitudinal Study of Adolescent Health Sample of females who were pregnant by age 18
| Full Sample (Weighted)
| |||||
|---|---|---|---|---|---|
| Variable | Obs | Mean | Std Dev | Min | Max |
| Birth Outcomes | |||||
| Live Birth | 889 | 0.59 | 0.49 | 0.00 | 1 |
| Miscarriage | 889 | 0.17 | 0.37 | 0.00 | 1 |
| Abortion | 889 | 0.24 | 0.43 | 0.00 | 1 |
| Outcomes | |||||
| Extraversion | 886 | 0.07 | 0.99 | −3.00 | 2.20 |
| Neuroticism | 887 | 0.35 | 0.97 | −2.36 | 3.40 |
| Agreeableness | 887 | 0.17 | 0.93 | −3.44 | 1.97 |
| Conscientiousness | 887 | 0.05 | 0.95 | −3.57 | 1.98 |
| Openness | 883 | −0.26 | 0.95 | −3.04 | 2.27 |
| Impulsivity (factor) | 886 | 0.06 | 0.65 | −2.10 | 1.46 |
| Go with my Gut Feeling | 887 | 3.43 | 1.02 | 1.00 | 5 |
| Like to take Risks | 887 | 3.14 | 0.97 | 1.00 | 5 |
| Live Life without Future Thought | 886 | 4.01 | 0.72 | 1.00 | 5 |
| Locus of Control (factor) | 886 | −0.10 | 0.83 | −3.27 | 1.55 |
| Little Control to Change Important Things | 886 | 3.93 | 0.78 | 1.00 | 5 |
| Other People Determine what I can Do | 887 | 4.11 | 0.78 | 1.00 | 5 |
| Many Things Interfere with what I Want to Do | 887 | 3.21 | 1.02 | 1.00 | 5 |
| I Have Little Control Over Things that Happen to me | 887 | 3.83 | 0.82 | 1.00 | 5 |
| There is Really no Way I can Solve my Problems | 887 | 4.05 | 0.62 | 1.00 | 5 |
| Optimism (factor) | 883 | 0.10 | 0.58 | −0.95 | 1.67 |
| Optimistic About the Future | 887 | 14.42 | 2.42 | 6.00 | 20.00 |
| Overall I Expect more Good Things than Bad | 886 | 2.14 | 0.81 | 1.00 | 5 |
| Pessimism | 887 | 3.50 | 0.96 | 1.00 | 5 |
| Depression Diagnosis | 889 | 0.34 | 0.47 | 0.00 | 1 |
| Depression Scale | 889 | 3.46 | 2.82 | 0.00 | 15 |
| Individual Characteristics | |||||
| Age (at wave 4) | 889 | 28.45 | 1.66 | 25.17 | 33.33 |
| White | 889 | 0.56 | 0.50 | 0.00 | 1 |
| Black | 889 | 0.26 | 0.44 | 0.00 | 1 |
| Hispanic | 889 | 0.15 | 0.36 | 0.00 | 1 |
| PPVT Test Score | 889 | 96.86 | 12.81 | 58.00 | 131 |
| General Health | 889 | 2.36 | 0.96 | 1 | 5 |
| Number of Births by wave 4 | 862 | 2.08 | 1.23 | 0.00 | 7 |
| Family Characteristics | |||||
| Mother’s Education | 889 | 12.63 | 1.86 | 0.00 | 17 |
| Family Income (In thousands of dollars) | 889 | 37.55 | 25.58 | 0.00 | 426 |
| Parents Married (=1) | 889 | 0.62 | 0.45 | 0.00 | 1 |
| Mother Work | 889 | 0.69 | 0.42 | 0.00 | 1 |
| Parent Missing Data | 889 | 0.36 | 0.48 | 0.00 | 1 |
| Age of Parent | 889 | 40.29 | 6.78 | 18.00 | 80 |
| Pregnancy Variables | |||||
| Conception Before age 15 | 889 | 0.07 | 0.26 | 0.00 | 1 |
| Smoke During Pregnancy | 874 | 0.27 | 0.44 | 0.00 | 1 |
Sample of Females who were pregnant by age 18. Statistics weighted using wave IV weights.
Miscarriages includes stillbirths