Table 3 Summary of the three rounds of Principal component analysis
PCA rounds | Factors extracted | KMO | Bartlett’s test of sphericity | Items Retained | Total variance explained |
|---|---|---|---|---|---|
Round 1 | 7 | 0.804 |  < 0.001 | 19 of 22 items | 57.90% |
Round 2 | 6 | 0.793 |  < 0.001 | 17of 19 items | 64.77% |
Round 3 | 6 | 0.760 |  < 0.001 | 17 items | 67.51% |