Table 1.
Descriptive Characteristics of Analytic Sample
| All Baseline mSPPB | Baseline mSPPB Subgroups | |||||
|---|---|---|---|---|---|---|
| Full Sample | Women | Men | High (10–12) | Intermediate (7–9) | Low (0–6) | |
| (N = 690) | (N = 451) | (N = 239) | (N = 160) | (N = 225) | (N = 305) | |
| (n = 4111 observations) | (n = 2913 observations) | (n = 1198 observations) | (n = 1074 observations) | (n = 1406 observations) | (n = 1631 observations) | |
| Mean (SD) or % | Mean (SD) or % | Mean (SD) or % | Mean (SD) or % | Mean (SD) or % | Mean (SD) or % | |
| Baseline | ||||||
| mSPPB score (0–12) | 6.9 (2.9) | 6.5 (2.9) | 7.7 (2.8) | 10.9 (0.9) | 7.8 (0.8) | 4.2 (1.4) |
| Age (y) | 78.3 (5.1) | 78.2 (5.2) | 78.4 (5.0) | 75.7 (3.9) | 77.6 (4.8) | 80.1 (5.3) |
| Women (%) | 65.4 | — | — | 53.1 | 65.3 | 71.8 |
| White (%) | 90.1 | 90.0 | 90.4 | 93.8 | 92.4 | 86.6 |
| Education (y) | 11.9 (2.9) | 11.8 (2.8) | 12.3 (3.0) | 12.9 (2.7) | 12.2 (2.7) | 11.3 (2.9) |
| Live alone (%) | 39.7 | 48.6 | 23.0 | 29.4 | 35.1 | 48.5 |
| Body mass index | 26.9 (5.1) | 27.2 (5.6) | 26.4 (4.3) | 26.4 (4.5) | 26.6 (4.5) | 27.4 (5.8) |
| Smoker (%) | 8.3 | 8.2 | 8.4 | 6.9 | 8.9 | 8.5 |
| Alcohol user (%) | 22.2 | 15.7 | 34.3 | 31.8 | 27.6 | 13.1 |
| PASE (1–360) | 91.7 (57.1) | 81.9 (52.2) | 110.2 (61.2) | 131.9 (56.3) | 100.3 (55.7) | 64.2 (42.3) |
| Chronic diseases (1–9) | 1.7 (1.2) | 1.7 (1.2) | 1.7 (1.2) | 1.3 (1.0) | 1.6 (1.2) | 2.0 (1.2) |
| Cognitive score (0–30) | 26.8 (2.4) | 26.9 (2.4) | 26.6 (2.5) | 27.4 (2.2) | 27.0 (2.3) | 26.3 (2.6) |
| Depressive symptoms (1–60) | 8.8 (8.5) | 9.8 (9.1) | 6.9 (6.8) | 6.2 (7.0) | 7.5 (7.6) | 11.2 (9.1) |
| Attrition | ||||||
| Died (%) | 68.1 | 66.1 | 71.9 | 47.5 | 67.6 | 79.3 |
| Survival (y) | 8.9 (3.4) | 9.1 (3.3) | 8.4 (3.5) | 10.1 (3.0) | 9.4 (3.1) | 7.8 (3.4) |
Note: mSPPB = modified Short Physical Performance Battery score; PASE = Physical Activity Score for the Elderly; SD = standard deviation.