| Descriptive statisticsa | |||
| Dependent variable: NI_prop | |||
| trichotomous age | Mean | Std. Deviation | N |
| <27 | 0.2917 | 0.14434 | 3 |
| 27 - 62 | 0.6714 | 0.23500 | 35 |
| 62+ | 0.6587 | 0.19544 | 26 |
| Total | 0.6484 | 0.22808 | 64 |