Table 2.
Multiple Regression Analyses with Age, Body Mass Index (BMI) and Quantitative Drug Index (QDI) as Predictors of Gait and Balance Test Scores, and Activities-specific Balance Confidence (ABC) Self-assessment Scores.
| Test | R2 | Durbin-Watson | Model ANOVA (p) | Variables | Beta (SE) | Standardized Beta | p | Collinearity VIF |
|---|---|---|---|---|---|---|---|---|
| BESTest (N=56) | 0.31 | 0.71 | <0.001 | Constant | 130.9 (13.9) | <0.001 | ||
| Age | −0.54 (0.16) | −0.40 | 0.001 | 1.05 | ||||
| BMI | −0.53 (0.17) | −0.36 | 0.003 | 1.05 | ||||
| QDI Score | −0.43 (0.21) | −0.24 | 0.04 | 1.01 | ||||
| BBS (N=56) | 0.37 | 0.75 | <0.001 | Constant | 78.7 (5.7) | <0.001 | ||
| Age | −0.29 (0.07) | −0.50 | <0.001 | 1.05 | ||||
| BMI | −0.19 (0.07) | −0.30 | 0.01 | 1.05 | ||||
| QDI Score | −0.20 (0.09) | −0.26 | 0.02 | 1.01 | ||||
| TUG (N=56) | 0.34 | 1.57 | <0.001 | Constant | −10.7 (5.2) | 0.04 | ||
| Age | 0.23 (0.06) | 0.44 | <0.001 | 1.05 | ||||
| BMI | 0.14 (0.06) | 0.25 | 0.04 | 1.05 | ||||
| QDI Score | 0.22 (0.08) | 0.32 | 0.007 | 1.01 | ||||
| TUGc (N=55) | 0.34 | 1.69 | <0.001 | Constant | −25.8 (9.1) | 0.007 | ||
| Age | 0.41 (0.10) | 0.50 | <0.001 | 1.04 | ||||
| BMI | 0.29 (0.11) | 0.30 | 0.01 | 1.05 | ||||
| QDI Score | 0.33 (0.14) | 0.27 | 0.02 | 1.01 | ||||
| ABC Scale (N=56) | 0.29 | 1.58 | <0.001 | Constant | 142.9 (26.4) | <0.001 | ||
| Age | −0.44 (0.30) | −0.17 | 0.15 | 1.05 | ||||
| BMI | −1.08 (0.32) | −0.40 | 0.002 | 1.05 | ||||
| QDI Score | −1.06 (0.39) | −0.32 | 0.009 | 1.01 |
BBS Berg balance scale, BESTest Balance Evaluation Systems Test total score, R2 Coefficient of Determination, SE standard error, TUG & TUGc timed up and go without and with cognitive dual task, VIF variance inflation factor.