Table 2. Sample characteristics North Carolina prison data.
| 1978 | 1980 | |||
|---|---|---|---|---|
| Estimation | Validation | Estimation | Validation | |
| N = 1,540 | N = 3,078 | N = 1,435 | N = 4,304 | |
| Observation time in months (mean) | 56.0 | 56.1 | 39.4 | 38.7 |
| % experiencing event | 37.0 | 37.4 | 37.0 | 37.5 |
| 4 year base rate (%) | 32.1 | 32.3 | 36.1 | 37.1 |
| TSERVD (mean) | 18.8 | 19.8 | 19.5 | 19.2 |
| AGE (mean) | 346.1 | 342.3 | 339.0 | 341.9 |
| PRIORS (mean) | 1.4 | 1.4 | 1.4 | 1.3 |
| RULE (mean) | 1.1 | 1.3 | 1.5 | 1.5 |
| SCHOOL (mean) | 9.7 | 9.7 | 9.6 | 9.6 |
| WHITE (%) | 50.9 | 52.2 | 51.0 | 51.1 |
| MALE (%) | 93.8 | 94.3 | 94.6 | 94.4 |
| ALCHY (%) | 21.0 | 19.6 | 35.7 | 36.0 |
| JUNKY (%) | 23.9 | 27.2 | 21.8 | 19.6 |
| MARRIED (%) | 25.6 | 26.8 | 23.4 | 23.3 |
| SUPER (%) | 69.8 | 69.6 | 80.1 | 81.6 |
| WORKREL (%) | 45.5 | 46.5 | 43.3 | 42.9 |
| FELON (%) | 31.2 | 32.1 | 43.1 | 41.3 |
| PERSON (%) | 6.0 | 5.3 | 11.3 | 11.2 |
| PROPTY (%) | 25.1 | 25.7 | 44.7 | 44.0 |