Table 1.
Comparison of baseline demographic data according to the quintiles of gait speed
| Variable | Gait Speed N = 1063 | P value | ||||
|---|---|---|---|---|---|---|
| Q1 230 (21.6%) |
Q2 215 (20.2%) |
Q3 227 (21.4%) |
Q4 199 (18.7%) |
Q5 192 (18.1%) |
||
| Age (years) | 72.7 ± 5.4 | 70.4 ± 5.6 | 69.3 ± 5.4 | 67.1 ± 5.2 | 66.3 ± 4.9 | < 0.001 |
| Gender | 0.684 | |||||
| Male | 121 (52.6%) | 102 (44.4%) | 122 (53.7%) | 98 (49.2%) | 99 (51.6%) | |
| Female | 109 (47.4%) | 113 (52.6%) | 105 (46.3%) | 101 (50.8%) | 93 (48.4%) | |
| Smoking status | 0.124 | |||||
| Non-smoking | 180 (78.3%) | 183 (85.5%) | 190 (83.7%) | 169 (84.9%) | 167 (87.0%) | |
| Smoking | 50 (21.7%) | 31 (14.5%) | 37 (16.3%) | 30 (15.1%) | 25 (13.0%) | |
| Education (years) | 10.4 ± 2.7 | 10.3 ± 2.5 | 10.8 ± 2.7 | 11.2 ± 2.4 | 11.5 ± 2.6 | < 0.001 |
| Marital status | 0.060 | |||||
| Single | 61 (26.5%) | 41 (19.2%) | 44 (19.4%) | 36 (18.1%) | 30 (15.6%) | |
| Married | 169 (73.5%) | 174 (80.9%) | 183 (80.6%) | 163 (81.9%) | 162 (84.4%) | |
| BMI (kg/m2) | 23.0 ± 3.3 | 22.7 ± 2.8 | 22.9 ± 3.0 | 22.6 ± 2.9 | 23.0 ± 2.7 | 0.616 |
| TMIG-IC | 4.8 ± 0.5 | 4.9 ± 0.3 | 4.9 ± 0.3 | 4.9 ± 0.3 | 4.9 ± 0.5 | 0.168 |
| Depressive symptom | 0.030 | |||||
| Yes | 34 (15.6%) | 24 (11.4%) | 19 (8.7%) | 18 (9.4%) | 12 (6.4%) | |
| No | 184 (84.4%) | 186 (88.6%) | 200 (91.3%) | 174 (90.6%) | 176 (93.6%) | |
| CCI | 1.8 ± 2.6 | 1.7 ± 2.3 | 1.2 ± 1.8 | 1.4 ± 1.8 | 1.2 ± 1.6 | 0.002 |
| MMSE | 27.8 ± 1.8 | 28.1 ± 1.6 | 28.1 ± 1.6 | 28.1 ± 1.6 | 28.3 ± 1.5 | 0.025 |
| DSST | 37.4 ± 10.2 | 41.5 ± 9.7 | 43.2 ± 10.5 | 46.2 ± 11.0 | 48.0 ± 11.1 | < 0.001 |
Values are presented as the mean (SD) or counts (percentages)
Gait speed in each group:
In males: Q1 as the lowest quintile and Q5 as the highest quintile; ≦1.12; 1.13–1.25; 1.26–1.37; 1.38–1.47; and > 1.48, m/s
In females: Q1 as the lowest quintile and Q5 as the highest quintile; ≦1.13; 1.14–1.22; 1.23–1.32; 1.33–1.42; and > 1.43, m/s
BMI body mass index, TMIG-IC Tokyo Metropolitan Institute of Gerontology Index of Competence, CCI Charlson Comorbidity Index, MMSE Mini-Mental State Examination, DSST Digit Symbol Substitution Test
The following data were missing: smoking status, n = 1; TMIG-IC, n = 5; depressive symptoms, n = 36; CCI, n = 17; DSST, n = 2