Table 3.
Comparison of baseline characteristics between Wave 1 subjects with and without mortality data available (males).
| Mortality data available (N = 9,163) |
Mortality data not available (N = 4,648) |
Significance of the difference (P) | |
|---|---|---|---|
| Frailty variables | |||
| Exhaustion: yes (%) | 25.3 | 27.4 | 0.007χ |
| Weight loss: yes (%) | 5.9 | 7.8 | < 0.001χ |
| Handgrip strength, Kg: mean (SD) | 43.6 (10.5) | 42.4 (11.5) | < 0.001μ |
| Slowness: yes (%) | 10.9 | 13.6 | < 0.001χ |
| Low activity: hardly ever, or never (%) | 8.5 | 14.6 | < 0.001χ |
| Frailty classes | |||
| Non-frail (%) | 83.9 | 79.0 | < 0.001χ |
| Pre-frail (%) | 13.5 | 17.0 | < 0.001χ |
| Frail (%) | 2.7 | 4.0 | < 0.001χ |
| Sociodemographic | |||
| Age: mean (SD) | 64.2 (9.7) | 64.0 (10.1) | 0.071μ |
| Years of education: mean (SD) | 10.4 (4.5) | 10.5 (4.5) | 0.018μ |
| Physical | |||
| Self-rated health (best:1; worst:5): mean (SD) | 2.9 (1.1) | 3.0 (1.2) | < 0.001μ |
| No. chronic diseases: mean (SD) | 1.4 (1.3) | 1.5 (1.4) | 0.046μ |
| No. symptoms: mean (SD) | 1.2 (1.4) | 1.3 (1.5) | 0.080μ |
| No. contacts with doctor in last year: mean (SD) | 5.7 (9.0) | 7.4 (11.9) | < 0.001μ |
| Admitted to hospital in last year (%) | 13.1 | 14.9 | 0.003χ |
| Functional | |||
| No. limitations with ADLs: mean (SD) | 0.16 (0.66) | 0.22 (0.90) | 0.004μ |
| No. limitations with IADLs: mean (SD) | 0.23 (0.89) | 0.34 (1.07) | < 0.001μ |
| Received home care: personal/nursing (%) | 3.3 | 3.4 | 0.974χ |
| Received home care: domestic tasks (%) | 2.7 | 3.4 | 0.058χ |
| Psychological and cognitive | |||
| EURO-D score (min: 0; max: 12) (SD) | 1.8 (1.9) | 2.0 (2.2) | < 0.001μ |
| Verbal fluency test score: mean (SD) | 19.3 (7.3) | 18.6 (7.5) | < 0.001μ |
| Delayed word recall score: mean (SD) | 3.2 (1.9) | 3.0 (1.9) | < 0.001μ |
χ Chi-squared test; μ Mann-Whitney U test. Significant P values (< 0.01) are indicated in bold.