Gamma grade correlation coefficient between different items of the PPE-15 Questionnaire and overall satisfaction
| Correlation with overall patient satisfaction | Items* | Dimension† | G |
| Strong correlation (G≥0.5) | I8 | S2 | 0.663 |
| I1 | S1 | 0.627 | |
| I14 | S6 | 0.554 | |
| I7 | S2 | 0.521 | |
| I5 | S3 | 0.514 | |
| I15 | S6 | 0.507 | |
| Medium correlation (0.4≤G<0.5) | I11 | S5 | 0.495 |
| I9 | S3 | 0.485 | |
| I6 | S3 | 0.432 | |
| I4 | S2 | 0.415 | |
| Weak correlation (G<0.4) | I13 | S6 | 0.363 |
| I12 | S5 | 0.352 | |
| I2 | S1 | 0.325 | |
| I10 | S4 | 0.322 | |
| I3 | S1 | 0.283 |
Gamma grade correlation analysis was used. S2, respect for patient preference; S3, emotional support; S4, physical comfort; S5, involvement of family or friends; and S6, continuity of medical service.
*I1 to I15 are the 15 items of PPE-15 scale.
†S1, information transmission and patient education. S2: respect for patient preference, S3: emotionalsupport, S4: physical comfort, S5: involvement of family or friends, and S6:continuity of medical service
G, gamma coefficient; PPE, Picker Patient Experience.