Unadjusted and adjusted linear regression analyses of the associations between Cornell (dependent variable) and variables measuring demographic factors, cognitive and physical performance
| Independent variables | Unadjusted analysis | Adjusted analysis model 1 (R2=0.033) | Adjusted analysis model 2 (R2= 0.025) | Adjusted analysis model 3 (R2= 0.015) | |||||||||
| n | β | B (95 % CI) | Sig. | β | B (95 % CI) | Sig. | β | B (95 % CI) | Sig. | β | B (95 % CI) | Sig. | |
| Age in years | 170 | −0.06 | −0.61 (−2.21 to 0.99) | 0.45 | – | – | 0.93 | – | – | 0.82 | – | – | 0.83 |
| Gender (1=women and 2=men) | 169 | 0.05 | 0.03 (−0.07 to 0.12) | 0.56 | – | – | 0.65 | – | – | 0.87 | – | – | 0.82 |
| Duration of stay in nursing home (months) | 154 | 0.06 | 0.01 (−0.02 to 0.04) | 0.50 | |||||||||
| Number of diagnoses | 142 | 0.15 | 0.35 (−0.05 to 0.76) | 0.09 | |||||||||
| Number of drugs | 142 | 0.11 | 0.14 (−0.09 to 0.37) | 0.23 | |||||||||
| Use of walking aid (0=no and 1=yes) | 170 | 0.10 | 0.97 (−0.56 to 2.5) | 0.21 | |||||||||
| Able to rise from chair independently (0=no and 1=yes) | 168 | 0.14 | 2.68 (−0.25 to 5.60) | 0.07 | |||||||||
| Mini Mental State Examination in points | 147 | −0.01 | −0.01 (−0.17 to 0.15) | 0.90 | |||||||||
| Berg Balance Test in points | 166 | −0.22 | −0.07 (−0.12 to −0.02) | 0.005* | –0.22 | −0.07 (−0.12 to −0.02) | 0.006* | ||||||
| 30 s Chair Stand Test in number | 167 | −0.20 | −0.30 (−0.53 to −0.07) | 0.01* | –0.20 | −0.31 (−0.54 to −0.07) | 0.01* | ||||||
| Comfortable walking speed in m/s | 166 | −0.12 | −3.01 (−6.81 to 0.80) | 0.12 | |||||||||
| Maximum walking speed in m/s | 166 | −0.18 | −2.39 (−4.48 to −0.30) | 0.03* | −0.18 | −2.38 (−4.56 to −0.20) | 0.03* | ||||||
| Barthel Index in points | 162 | −0.13 | −0.16 (−0.36 to 0.04) | 0.12 | |||||||||
*p<0.05.
Model 1 does not include Chair Stand Test (CST) and maximum walking speed because of their high correlation with Berg Balance Scale (BBS) (r=0.7). Model 2 does not include BBS and maximum walking speed because of their high correlation with CST (r=0.7). Model 3 does not include BBS and CST because of their high correlation with maximum walking speed (r=0.7). n, number of registered; R2, adjusted coefficient of determination; B, unstandardised beta; CI, 95% confidence interval; β, standardised beta; Sig., levels of significance (p value). Mini Mental State Examination: range 0–30; low score indicates poor cognitive function. BBS: range 0–56; high score indicates good balance. 30 s CST (number of rises from chair within 30 s), comfortable and maximum walking speed in m/s; high scores on the physical tests indicate better physical function. Barthel Index: range 0–20; high score indicates greater dependency. Cornell Scale for Depression in Dementia: range 0–38; high score indicates more depressive symptoms.