Table 2.
Validation criteria for each BCSI
| Reliability | Criterion validity | Construct validity | ||||
| Test-Retest Reliability | Internal Consistency Reliability | Concurrent Validity | Predictive Validity | Convergent Validity | Divergent Validity | |
| Instrument | (Repeatability Coefficient) | (Cronbach’s Alpha) | (correlation of BCSI to more | |||
| general instrument) | ||||||
| FACT-BlA (V) | ||||||
| EORTC-QLQ-BLM30 | ||||||
| BCI (V) | 0.92 (urinary), 0.87 (bowel), | 0.85 (urinary), 0.82 (bowel), | Yes (SF12, FACT-Bl, FACT-G) | No | Used Function vs. Bother | Used interdomain |
| Correlations | correlations | |||||
| 0.92 (sexual) | 0.91 (sexual) | 0.48 (urinary), 0.45 (bowel), 0.56 (sexual)B | ||||
| FACT-Bl-Cys (V) | 0.79 | 0.83 | Yes (FACT-G)C | No | Correlate general QoL (from FACT-G/SF-36) | No |
| to cystectomy specific QoL (from FACT-Bl-Cys) | ||||||
| EORTC-QLQ-BLS24 | No | all scales > 0.7, except fever/ | Yes (EORTC-QLQ-C30) | No | Used physical function vs. symptom scale | No |
| (Phase III Results) | malaise/abdominal bloating | correlations | ||||
V = Validated. A) Validated, but no public psychometric data. B) Example: Correl(Urinary Bother, Urinary Function) = 0.48, suggesting that bother (importance) subscale quantifies impairments of functional (symptom) subscale. C) Taken from second psychometric study (Anderson et al.).