Table 3. Analysis of medical variables as predictors of 6-minute walk test result in dialysis patients.
| Parameter | Unadjusted analysis | Adjusted analysis* | ||||
|---|---|---|---|---|---|---|
| B | P | B (SE) | 95% C.I. | Partial Eta2 | p | |
| Age | -4.4 | <0.001 | -3.1 (0.5) | -4.1 to -2 | 0.31 | <0.001 |
| Body height (cm) | 4 | 0.001 | 3.9 (0.9) | 2.1 to 5.6 | 0.21 | <0.001 |
| Fat tissue mass (kg) | -10.9 | <0.001 | -3 (0.8) | -4.6 to –1.4 | 0.16 | <0.001 |
| Spont. gait speed (m/s) | 269.9 | <0.001 | 111 (37.7) | 36.4 to 186.5 | 0.11 | 0.004 |
| Davies comorbidity grade 0 vs.2 | 105 | 0.02 | 37.2 (31.3) | -25.2 to 99.7 | 0.02 | 0.24 |
| Davies comorbidity grade 1 vs.2 | 42 | 0.35 | 22.5 (31.1) | -39.4 to 84.4 | 0.01 | 0.47 |
| TIBC (μmol/l) | 0.5 | 0.78 | 2.5 (1.2) | 0.1 to 5 | 0.05 | 0.04 |
| Albumin (g/l) | -1.9 | 0.55 | -4.8 (3.1) | -11 to 1.4 | 0.03 | 0.13 |
| Haemoglobin (g/l) | 1.3 | 0.15 | 0.6 (0.6) | -0.5 to 1.8 | 0.02 | 0.28 |
| CRP (mg/l) | -54 | 0.04 | -0.1 (1.6) | -3.2 to 3 | 0 | 0.93 |
General linear model ANOVA
*N = 86, adjusted analysis model R2 = 0.7, adjusted R2 = 0.66, intercept B = -39.9 m. Significant negative coefficients B denote that physical performance worsens with increasing age and fat tissue mass; significant positive coefficients B denote that physical performance improves with increasing height, spontaneous gait speed and TIBC.