Angioplasty items: item–item correlations (homogeneity)
| Angioplasty items | 25 | 28 | 32 | 39 | 45 | 52 |
| 25. “Overall, angioplasty is a good thing” | – | 0.525 | 0.570 | 0.221 | 0.333 | 0.430 |
| 28. “The balance of risks and benefits of angioplasty seem better than the risks and benefits of medication” | 0.525 | – | 0.423 | 0.210 | 0.322 | 0.318 |
| 32. “People who have angioplasty seem to do well” | 0.570 | 0.423 | – | 0.210 | 0.334 | 0.410 |
| 39. “Angioplasty is a last resort” | 0.221 | 0.210 | 0.210 | – | 0.420 | 0.422 |
| 45. “I'm too old to have angioplasty” | 0.333 | 0.322 | 0.334 | 0.420 | – | 0.612 |
| 52. “I'd put off having angioplasty” | 0.430 | 0.318 | 0.410 | 0.422 | 0.612 | – |