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Table 2 Item difficulty and fit statistics of the 10 items of ODI

From: Measurement precision of the disability for back pain scale-by applying Rasch analysis

Item Difficulty logit SE logit Infit MNSQ Outfit MNSQ
ODI 2: Personal care 0.84 0.05 0.87 0.89
ODI 7: Sleeping 0.61 0.06 1.40 1.49
ODI 5: Sitting 0.34 0.05 1.29 1.39
ODI 4: Walking 0.26 0.05 0.77 0.75
ODI 1: Pain intensity −0.10 0.06 1.26 1.21
ODI 9: Social life −0.17 0.05 0.80 0.78
ODI 8: Sex life −0.32 0.07 1.03 1.06
ODI 6: Standing −0.48 0.05 0.79 0.75
ODI 10: Traveling −0.48 0.05 0.74 0.71
ODI 3: Lifting −0.49 0.05 1.14 1.20