| Descriptive statisticsa | |||
| Dependent variable: NI_prop | |||
| trichotomous age | Mean | Std. Deviation | N |
| <27 | 0.6719 | 0.16421 | 32 |
| 27 - 62 | 0.8125 | 0.08839 | 2 |
| 62+ | 0.5938 | 0.11968 | 4 |
| Total | 0.6711 | 0.16029 | 38 |