Means and SDs (in parentheses) of selected participant characteristics and the five secondary outcome neuropsychological tests at randomisation by training group status, N=681
| Variable | Overall N=681 | Road Tour on-site N=154 | Road Tour on-site with future boosters N=148 | Attention control on-site N=188 | Road Tour at-home N=191 |
| Personal characteristics | |||||
| Age (years) | 61.9 (8.2) | 61.4 (8.1) | 62.5 (8.2) | 61.8 (8.7) | 61.9 (7.9) |
| Men (%) | 37.3 (0.5) | 37.2 (0.5) | 32.5 (0.5) | 42.0 (0.5) | 36.7 (0.5) |
| Married (%) | 69.9 (0.5) | 73.0 (0.5) | 61.0 (0.5) | 73.4 (0.4) | 71.2 (0.5) |
| Single (%) | 11.2 (0.3) | 10.1 (0.3) | 14.9 (0.4) | 8.0 (0.3) | 12.0 (0.3) |
| Working (%) | 54.5 (0.5) | 56.8 (0.5) | 53.9 (0.5) | 50.0 (0.5) | 57.6 (0.6) |
| Retired (%) | 35.5 (0.4) | 35.1 (0.5) | 36.4 (0.4) | 34.2 (0.5) | 34.6 (0.3) |
| Income ≤ $35K (%) | 28.3 (0.5) | 24.3 (0.4) | 36.4 (0.5) | 27.7 (0.5) | 25.7 (0.4) |
| Income ≥ $75K (%) | 46.6 (0.5) | 45.3 (0.5) | 41.6 (0.4) | 47.3 (0.5) | 50.8 (0.5) |
| Self-rated health (5=best 1=worst) | 3.8 (0.9) | 3.8 (0.9) | 3.8 (0.8) | 3.7 (0.9) | 3.9 (0.8) |
| One-year change in self-rated health (5=best, 1=worst) | 3.2 (0.8) | 3.3 (0.8) | 3.3 (0.8) | 3.2 (0.8) | 3.3 (0.7) |
| Training time | |||||
| Minutes of training | 469 (217) | 450 (199) | 488 (151) | 535 (154) | 404 (295) |
| Neuropsychological tests | |||||
| SDMT (number of correct) | 50.5 (9.4) | 51.8 (9.0) | 50.5 (9.5) | 48.7 (9.3) | 51.1 (9.6) |
| Trails A (sec) | 41.9 (13.3) | 40.9 (10.9) | 39.8 (12.3) | 45.0 (16.3) | 41.2 (12.0) |
| Trails B (sec) | 66.9 (27.2) | 63.8 (30.8) | 65.8 (23.9) | 71.8 (30.3) | 65.2 (22.1) |
| COWAT composite (number of words) | 42.0 (11.9) | 42.4 (11.0) | 41.9 (12.7) | 40.5 (11.5) | 43.2 (12.4) |
| DVT errors (n) | 8.1 (8.2) | 7.5 (9.6) | 9.0 (7.7) | 7.9 (7.6) | 8.0 (7.8) |
| DVT time (s) | 377.0 (84.1) | 369.0 (82.2) | 374.8 (83.7) | 387.9 (86.5) | 374.5 (83.1) |
| Stroop word (n) | 70.4 (13.1) | 71.2 (13.6) | 71.8 (13.5) | 68.1 (12.8) | 71.1 (12.4) |
| Stroop colour (n) | 97.8 (17.6) | 100.3 (17.3) | 96.5 (18.7) | 95.3 (17.8) | 99.3 (16.5) |
| Stroop colour-word (n) | 38.1 (9.0) | 38.7 (9.5) | 38.0 (8.7) | 37.1 (9.1) | 38.6 (8.9) |
COWAT, Controlled Oral Word Association Test; DVT, Digit Vigilance Test; SDMT, Symbol Digit Modalities Test.