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Table 2 Ordinal FA

From: Exploring differential item functioning in the SF-36 by demographic, clinical, psychological and social factors in an osteoarthritis population

SF-36 subscale Factor1 eigenvalue % variance Factor2 eigenvalue % variance Factor3 eigenvalue % variance MAP: number of dimensions N
Physical 7.83 78.3 0.50 5.0 0.47 4.7 1 734
Role phys 3.65 91.3 0.15 3.8 0.13 3.3 1 749
Role emot 2.71 90.3 0.19 6.3 0.10 3.3 1 742
Mental 3.36 67.1 0.67 13.3 0.46 9.2 1 753
Vitality 2.94 73.4 0.61 15.2 24.1 6.0 1 754
Gen health 3.27 65.5 0.65 13.0 0.56 11.3 1 756