Table 3. Influence of physical fitness and serum vitamin D levels on MMSE-based cognitive function.
Independent variables |
β (95% CI) |
R2 |
∆R2 |
Step 1 |
.425 *** |
.410 *** |
Age |
-.100 * (-.188 – -.012) |
|
|
Sex |
-.358 (-1.546 – .830) |
|
|
Education |
.515 *** (.388 – .642) |
|
|
GDS |
-.123 * (-.247 – .001) |
|
|
Step 2 |
.426 *** |
.403 |
Age |
-.102 * (-.191 – -.013) |
|
|
Sex |
-.833 (-3.250 – 1.583) |
|
|
Education |
.519 *** (.389 – .649) |
|
|
GDS |
-.127 * (-.253 – -.001) |
|
|
BMI |
-.088 (-.428 – .252) |
|
|
Percent body fat |
.060 (-.194 – .313) |
|
|
Step 3 |
.513 *** |
.468 ** |
Age |
-.021 (-.116 – .075) |
|
|
Sex |
-.639 (-2.981 – 1.703) |
|
|
Education |
.435 *** 0.303 – .567) |
|
|
GDS |
-.065 (-.191 – .061) |
|
|
BMI |
-.012 (-.351 – .327) |
|
|
Percent body fat |
.044 (-.206 – .293) |
|
|
Arm curl |
.010 (-.107 – .126) |
|
|
Chair stand up for 30 s |
-.018 (-.178 – .141) |
|
|
Back scratch |
.025 (-.010 – .061) |
|
|
Chair-sit-and-reach |
-.006 (-.056 – .044) |
|
|
Eight-foot-up-and-go |
-.368 * (-.697 – -.039) |
|
|
The 6-min walk |
.027 * (.004 – .050) |
|
|
Vitamin D |
.061 * (.014 – .108) |
|
|
* p < 0.05*** p < 0.001 using multiple hierarchical regression. The control variables were age, sex, education level, GDS, and comorbidity index. Abbreviations: β, standardized regression coefficient; CI, confidence interval; ∆R
2, change in R
2; GDS, geriatric depression scale; MMSE, Mini-Mental State Examination.