Table 1.
Bifactor CFA model factor loadings for the KDQOL-36
| Item | General Factor | Specific Factor: Burden of Kidney Disease | Specific Factor: Symptoms/Problems of Kidney Disease | Specific Factor: Effects of Kidney Disease |
|---|---|---|---|---|
| My kidney disease interferes too much with my life (i13) | 0.63 | 0.62 | — | — |
| Too much time is spent dealing with kidney disease (i14) | 0.60 | 0.68 | — | — |
| I feel frustrated dealing with my kidney disease (i15) | 0.67 | 0.48 | — | — |
| I feel like a burden on my family (i16) | 0.61 | 0.32 | — | — |
| Soreness in your muscles? (i17) | 0.53 | — | 0.33 | — |
| Chest pain? (i18) | 0.46 | — | 0.39 | — |
| Cramps? (i19) | 0.40 | — | 0.32 | — |
| Itchy skin? (i20) | 0.37 | — | 0.67 | — |
| Dry skin? (i21) | 0.41 | — | 0.65 | — |
| Shortness of breath? (i22) | 0.47 | — | 0.38 | — |
| Faintness or dizziness? (i23) | 0.50 | — | 0.35 | — |
| Lack of appetite? (i24) | 0.46 | — | 0.31 | — |
| Washed out or drained? (i25) | 0.65 | — | 0.30 | — |
| Numbness in hands or feet? (i26) | 0.47 | — | 0.34 | — |
| Nausea or upset stomach? (i27) | 0.51 | — | 0.36 | — |
| Problems with your access/catheter site? (i28) | 0.41 | — | 0.17 | — |
| Fluid restriction? (i29) | 0.57 | — | — | 0.50 |
| Dietary restriction? (i30) | 0.61 | — | — | 0.67 |
| Your ability to work around the house? (i31) | 0.75 | — | — | −0.01 |
| Your ability to travel? (i32) | 0.70 | — | — | 0.07 |
| Being dependent on doctors and other medical staff? (i33) | 0.75 | — | — | 0.04 |
| Stress or worries caused by kidney disease? (i34) | 0.84 | — | — | −0.01 |
| Your sex life? (i35) | 0.58 | — | — | 0.02 |
| Your personal appearance? (i36) | 0.73 | — | — | 0.02 |
—, item was not set to load on this factor.