Table 3.
Corrected item-to-total correlation and factors loading in principal component analysis (PCA)
| Patients’ responses | Answers | Corrected item-total correlation | Cronbach’s alpha if item deleted | Loading factors | |||
|---|---|---|---|---|---|---|---|
| No. (%) | Mean | SD | |||||
| Question 1 | No | 119 (59.5%) | 0.59 | 0.49 | 0.419 | 0.662 | 0.224 |
| Question 2 | No | 164 (82.0%) | 0.82 | 0.39 | 0.257 | 0.693 | 0.430 |
| Question 3 | No | 140 (70.0%) | 0.70 | 0.46 | 0.432 | 0.660 | 0.401 |
| Question 4 | No | 125 (62.5%) | 0.63 | 0.49 | 0.379 | 0.670 | 0.184 |
| Question 5 | Yes | 174 (87.0%) | 0.87 | 0.34 | 0.315 | 0.685 | 0.776 |
| Question 6 | No | 125 (62.5%) | 0.63 | 0.49 | 0.426 | 0.660 | 0.648 |
| Question 7 | No | 128 (64.0%) | 0.64 | 0.48 | 0.293 | 0.687 | 0.146 |
| Question 8 | Never | 48 (24.0%) | |||||
| Rarely | 74 (37.0%) | ||||||
| Sometimes | 65 (32.5%) | ||||||
| Usually | 13 (6.5%) | ||||||
| All the time | 0 (0.0%) | ||||||
Overall Cronbach’s alpha for 8 items= 0.697.