Exploring differential item functioning in the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC).

BMC Musculoskelet Disord · 2012 · PMC3582585 · PMID 23273389

Europe PMC DOI

hedged sentence

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closest p

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highly significantno p-value reported

The impact of the DIF items on BMI for physical functioning subscale and for age for the hip pain subscale appear less likely to change conclusions as although use of the DIF free items did significantly reduce the level of significance, the actual differences were still highly significant.

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