Table 2 Multi-trait scaling analysis of the Indonesian ThYCA-QoL Questionnaire
Multi-item scales | Cronbach Alpha | Item-scale convergent validity | Item-scale divergent validity | Scaling errors |
|---|---|---|---|---|
Throat/mouth problem Dry mouth, problem with swallowing, lump in the throat (1,2,5) | 0.72 | 0.76–0.83 | 0.29–0.52 | Null |
Voice Hoarseness, weak voice (3,4) | 0.66 | 0.81–0.92 | 0.15–0.33 | Null |
Sympathetic Sensitive heat, hot flushes (8,9) | 0.70 | 0.87–0.88 | 0.18–0.46 | Null |
Neuromuscular Pain at joints and muscle, cramps leg, felt slowed down (10, 12, 13) | 0.63 | 0.75–079 | 0.24–0.60 | Null |
Sensory Eye problems, skin problems (15, 16) | 0.52 | 0.82–0.83 | 0.16–0.50 | Null |
Psychological Palpitations, abrupt tiredness, restless, anxious (17, 19, 22, 23) | 0.83 | 0.75–0.88 | 0.17–0.70 | Null |
Concentration Difficulty thinking, attentional problem (20, 21) | 0.81 | 0.91–0.92 | 0.22–0.76 | Null |
Single-item scales Problem with scar (6) Felt chilly (7) Tingling on hands and/feet (11) Gained weight (14) Headache (18) Less interest in sex (24) |