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. 2021 Apr 23;100(16):e25641. doi: 10.1097/MD.0000000000025641

Table 5.

Principal components loading (PCA) for factors analyzed in clinical studies and KMO and Bartlett's test.

Factors PC1 PC2 PC3 PC4
(A) Clinical trial was randomized or not? 0.610 0.141 0.140 −0.463
(B) Clinical trial was blinded or non-blinded? 0.665 −0.556 0.010 −0.032
(C) Treatment allocation was concealed or not? 0.806 −0.141 −0.213 0.123
(D) The outcome assessor was blinded or not? 0.270 0.399 −0.157 −0.610
(E) Patient was blinded in the study or not? 0.866 −0.286 −0.217 0.125
(F) The care provider was blinded or not? 0.634 0.186 −0.543 0.281
(G) The intention to treat analysis, was mentioned in clinical trial? 0.416 −0.066 0.602 −0.197
(H) Proper drop out procedure was mentioned? 0.640 0.249 0.320 −0.098
(I) Was the patient compliance for the clinical trial reported? 0.285 0.624 0.328 0.206
(J) Was the timing of outcome assessment mentioned? 0.111 −0.267 0.628 0.352
(K) Was the baseline characteristics for the group mentioned? 0.233 0.121 0.203 0.299
(L) Was any co-interventions mentioned? 0.168 0.654 −0.068 0.356
Variability % 23.12 15.83 13.11 11.38
Cumulative % 23.12 38.96 52.07 63.455
KMO and Bartlett's test
Kaiser–Meyer–Olkin measure of sampling adequacy 0.659
Bartlett's test of sphericity Approx. Chi-square 289.58
degree of freedom 66
Significance 0.000