. 2026 Jul 10;9(5):1104–1113. doi: 10.31662/jmaj.2026-0093

Table 3.

Comparison of the Structural Validity and Internal Consistency Reliability between the J-PCOS and its Shorter Versions.

Scale version	CFI	RMSEA	SRMR	Cronbach’s alpha
J-PCOS^a	0.954	0.086	0.028	0.95
J-PCOS-8^a	0.986	0.072	0.016	0.92
J-PCOS-4^a	N/A	N/A	N/A	0.86
J-PCOS-2^a	N/A	N/A	N/A	0.74

CFI: comparative fit index; J-PCOS: Japanese version of the Patient Care Ownership Scale; J-PCOS-2: 2-item version of the J-PCOS; J-PCOS-4: 4-item version of the J-PCOS; J-PCOS-8: 8-item version of the J-PCOS; N/A: not applicable; RMSEA: root mean square error of approximation; SRMR: standardized root mean square residual.

^aThe scores range from 1 to 7, with higher scores indicating greater patient care ownership.