Cronbach’s alpha | McDonald’s omega | Alpha value if one item deleted | Item-total correlation | |||||
---|---|---|---|---|---|---|---|---|
Self-report | Proxy-report | Self-report | Proxy-report | Self-report | Proxy-reports | Self-report | Proxy-report | |
Heart problems and treatment | 0.80 | 0.87 | 0.82 | 0.87 | 0.75- 0.81 | 0.84–0.87 | 0.36- 0.72 | 0.48–0.76 |
Perceived physical appearance | 0.71 | 0.83 | 0.77 | 0.86 | 0.45–0.72 | 0.69–0.85 | 0.45–0.66 | 0.61–0.76 |
Treatment anxiety | 0.85 | 0.95 | 0.86 | 0.95 | 0.77–0.88 | 0.91–0.98 | 0.67–0.81 | 0.76–0.94 |
Cognitive problems | 0.82 | 0.89 | 0.82 | 0.90 | 0.76–0.80 | 0.85–0.90 | 0.55–0.69 | 0.62–0.83 |
Communication | 0.82 | 0.82 | 0.82 | 0.83 | 0.65–0.84 | 0.67–0.85 | 0.59–0.78 | 0.61–0.77 |
Total scale | 0.88 | 0.91 | 0.87 | 0.91 | 0.87–0.88 | 0.91–0.91 | 0.34–0.60 | 0.43–0.63 |