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Table 1 Comparison of baseline demographic data according to the quintiles of gait speed

From: Role of gait speed and grip strength in predicting 10-year cognitive decline among community-dwelling older people

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
  1. Values are presented as the mean (SD) or counts (percentages)
  2. Gait speed in each group:
  3. 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
  4. 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
  5. 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
  6. The following data were missing: smoking status, n = 1; TMIG-IC, n = 5; depressive symptoms, n = 36; CCI, n = 17; DSST, n = 2