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Sample Statistics
| Wave | N | Mean Age (SD) |
|---|---|---|
| IPT1 | 272 | 63.99 (6.9) |
| IPT2 | 292 | 64.27 (8.2) |
| IPT3 | 306 | 66.54 (8.8) |
| IPT4 | 29 | 67.24 (9.3) |
| IPT5 | 312 | 68.88 (9.0) |
| IPT6 | 277 | 71.23 (8.6) |
| IPT7 | 242 | 73.50 (8.2) |
| IPT8 | 212 | 75.14 (8.0) |
| Retirement age | 421 | 62.87 (4.4) |
| Leisure activities | 421 | 73.4 (10.6) |
