Table 6.
Summary of LPH Properties
| Dimension |
Structural properties of the LPH |
Percentages of patients having the lowest or highest possible LPH scores |
Internal consistency reliability of LPH scores |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # of items | Range of item-scale correlations | % of items meeting convergent validity criterion1 | % of items meeting discriminant validity criterion2 | Lowest possible score | Highest possible score |
Baseline LPH population (N=190) |
Visit 6/last visit LPH population (N=176) |
Baseline |
Visit 6/last visit |
|||||
| N (%) at floor | N (%) at ceiling | N (%) at floor | N (%) at ceiling | N | Cronbach’s Alpha | N | Cronbach’s Alpha | |||||||
| LPH Emotional score |
5 |
0.59-0.76 |
100% |
100% |
0 |
25 |
16 (8.42%) |
6 (3.16%) |
16 (9.09%) |
2 (1.14%) |
189 |
0.87 |
176 |
0.87 |
| LPH Physical score |
8 |
0.43-0.78 |
100% |
100% |
0 |
40 |
4 (2.11%) |
0 (0.00%) |
0 (0.00%) |
0 (0.00%) |
190 |
0.89 |
175 |
0.90 |
| LPH Total score | 21 | 0.38-0.72 | 90% | 100% | 0 | 105 | 2 (1.05%) | 0 (0.00%) | 0 (0.00%) | 0 (0.00%) | 185 | 0.92 | 171 | 0.92 |
1 Correlation between each item and its own scale corrected for overlap should be at least 0.40.
2 Each item should correlated significantly higher with its hypothesized scale than with the other scale in the measure.