Table 2.
Descriptive Statistics
| All Twins (1) |
Pooled 1999/2000 HSE (2) |
Discordant Twins (3) |
Concordant Twins (4) |
|
|---|---|---|---|---|
| Demographic Characteristics | ||||
| Age | 49.79 (12.16) |
47.26 (14.05) |
49.05 (11.09) |
50.32 (12.84) |
| Schooling | ||||
| Grades of completed schooling | 13.44 (2.55) |
12.43 (2.46) |
13.63 (2.43) |
13.31 (2.61) |
| Proportion with | ||||
| Less than 12 grades of schooling | 0.27 (0.44) |
0.40 (0.49) |
0.24 (0.43) |
0.29 (0.45) |
| 12 grades of schooling | 0.28 (0.45) |
0.30 (0.46) |
0.25 (0.43) |
0.30 (0.46) |
| 14–16 grades of schooling | 0.27 (0.44) |
0.16 (0.37) |
0.36 (0.48) |
0.20 (0.40) |
| 17 grades of schooling | 0.19 (0.39) |
0.13 (0.33) |
0.15 (0.36) |
0.21 (0.41) |
|
Health Outcomes BMI |
24.55 (4.35) |
26.82 (5.37) |
24.51 (4.21) |
24.58 (4.45) |
| Overweight | .37 (.48) |
.57 (.50) |
0.36 (0.49) |
0.36 (0.48) |
| Shortness of breath when walking | 0.30 (0.53) |
0.29 (0.50) |
0.30 (0.55) |
|
| Health-Related Behaviors | ||||
| Never Smoked | .61 (.49) |
.40 (.49) |
0.59 (0.49) |
0.63 (0.48) |
| Current Smoker | .12 (.33) |
.26 (.44) |
0.15 (0.36) |
0.10 (0.30) |
| Alcohol Consumption | 5.39 (7.94) |
5.90 (9.43) |
5.02 (6.64) |
|
| Moderate or Heavy Exercise during leisure time |
.63 (.48) |
0.64 (0.48) |
0.63 (0.48) |
|
| N | 1482 | 6846 | 622 | 860 |
Notes: Standard deviations in parentheses.