Table 6.
Impact of weighting procedure on index score for individual quality of life, and on correlations with global quality of life
| DW index | ACA index | Unweighted index | |
|---|---|---|---|
| r | r | r | |
| Index score for individual quality of life | |||
| DW-index score | 1.0 | 0.95** | 0.92** |
| ACA-index score | 0.95** | 1.0 | 0.89** |
| Unweighted index score | 0.92** | 0.89** | 1.0 |
| SEIQoL VAS | 0.62** | 0.54** | 0.63** |
| QoL VAS | 0.40* | 0.36* | 0.33* |
*P < 0.05; **P < 0.001
DW, direct weighting; ACA, adaptive conjoint analysis; SEIQoL, schedule for evaluation of individual quality of life; VAS, visual analogue scale; QoL, quality of life