Table 3.
Distribution of subjective health scores, test scores, and cognitive impairment: baseline, final wave and pooled data
| Variables | Baseline wave (2012) | Final wave (2016) | Pooled sample (2012 and 2016) | |||
|---|---|---|---|---|---|---|
| n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | |
| SF-36 domain scores | ||||||
| Physical functioning | 5,192 | 74.22 (25.12) | 5,545 | 75.29 (24.77) | 10,737 | 74.77 (24.94) |
| Role physical | 5,192 | 68.51 (41.37) | 5,545 | 68.73 (41.27) | 10,737 | 68.63 (41.32) |
| Role emotional | 5,192 | 81.43 (34.84) | 5,545 | 81.54 (34.66) | 10,737 | 81.48 (34.75) |
| Social functioning | 5,192 | 80.99 (24.44) | 5,545 | 80.29 (24.86) | 10,737 | 80.63 (24.66) |
| Mental health | 5,192 | 76.62 (16.79) | 5,545 | 76.01 (17.21) | 10,737 | 76.30 (17.01) |
| Vitality | 5,192 | 60.53 (20.22) | 5,545 | 59.90 (20.48) | 10,737 | 60.20 (20.36) |
| Bodily pain | 5,192 | 65.84 (24.79) | 5,545 | 65.42 (24.82) | 10,737 | 65.62 (24.80) |
| General health | 5,192 | 63.97 (21.66) | 5,545 | 63.68 (21.67) | 10,737 | 63.82 (21.67) |
| SF-36 component summary scores | ||||||
| PCS | 5,192 | 44.49 (11.34) | 5,545 | 44.75 (11.26) | 10,737 | 44.63 (11.30) |
| MCS | 5,192 | 50.74 (10.01) | 5,545 | 50.30 (10.17) | 10,737 | 50.51 (10.10) |
| Utility score | ||||||
| SF-6D | 5,192 | 0.74 (0.13) | 5,545 | 0.74 (0.12) | 10,737 | 0.74 (0.13) |
| Backward Digit Span (BDS) test score | 5,192 | 4.80 (1.40) | 5,545 | 4.87 (1.40) | 10,737 | 4.83 (1.40) |
| Symbol Digit Modalities Test (SDMT) score | 5,192 | 42.02 (12.01) | 5,545 | 43.20 (11.73) | 10,737 | 42.63 (11.88) |
| Cognitive impairment, n (%) | ||||||
| No | 4,559 | 87.81 | 5,010 | 90.35 | 9,569 | 89.12 |
| Moderate | 597 | 11.50 | 494 | 8.91 | 1,091 | 10.16 |
| Severe | 36 | 0.69 | 41 | 0.74 | 77 | 0.72 |
Note: 1. In the pooled waves, a total of 10,737 person-year observations were considered from 6892 unique persons