https://www.selleckchem.com/pr....oducts/protoporphyri
Of the 4052 patients included in this analysis, 3281 (80.97%) were younger than 75years old, while 3239 (79.94%) were male. Both exploratory and confirmatory factor analyses revealed a four-factorial structure consisting of 16 items that provided a better fit to the data (RMSEA = 0.049 [90% CI = (0.047, 0.052)]; CFI = 0.975). The 16-item SAQ demonstrated good to excellent internal reliability (Cronbach's α range from 0.77 to 0.9, moderate to strong correlation with the Original SAQ and EQ5D but negligible correlations with H
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