Surgery items: item–item correlations (homogeneity)
| Surgery items | 2 | 30 | 36 | 43 | 46 | 47 |
| 2. “Surgery would prolong my life” | – | 0.512 | 0.430 | 0.440 | 0.244 | 0.313 |
| 30. “Overall surgery is a good thing” | 0.512 | – | 0.420 | 0.512 | 0.410 | 0.518 |
| 36. “The balance of risks and benefits of surgery seem better than the risks and benefits of medication” | 0.430 | 0.420 | – | 0.450 | 0.231 | 0.305 |
| 43. “Surgery gets the treatment over with quickly” | 0.440 | 0.512 | 0.450 | – | 0.301 | 0.432 |
| 46. “I would have surgery if I could avoid being a burden on others in the long term” | 0.244 | 0.410 | 0.231 | 0.301 | – | 0.311 |
| 47. “People who have surgery seem to do well” | 0.313 | 0.518 | 0.310 | 0.432 | 0.311 | – |