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Table 2 Differential Item functioning for gender

From: Internal construct validity of the Warwick-Edinburgh Mental Well-being Scale (WEMWBS): a Rasch analysis using data from the Scottish Health Education Population Survey

Item Main Effect for Gender Gender-Trait Interaction
  Males Females DF Prob Males Females DF Prob
1 0.04015 0.04142 1 0.838742 1.09147 1.12607 9 0.341345
2 1.97595 2.14194 1 0.143738 1.00945 1.09425 9 0.364425
3 8.80378 9.87322 1 0.001733 0.30942 0.34701 9 0.958872
4 33.40524 30.25532 1 0.000016 0.91752 0.831 9 0.587624
5 13.15898 12.5703 1 0.000431 1.95187 1.86455 9 0.054061
6 1.64136 1.94816 1 0.163188 0.74287 0.88173 9 0.541148
7 3.22218 3.97158 1 0.046619 1.51676 1.86952 9 0.053306
8 8.52653 12.92955 1 0.000355 0.47544 0.72096 9 0.689971
9 20.25451 21.9388 1 0.000019 0.1508 0.16334 9 0.997325
10 20.48471 26.80281 1 0.000000 0.03225 0.0422 9 0.999991
11 0.3434 0.3741 1 0.540959 0.93481 1.01839 9 0.423315
12 16.02162 14.70792 1 0.000147 0.41747 0.38324 9 0.943387
13 1.4163 1.16839 1 0.280081 1.29212 1.06595 9 0.385782
14 0.39479 0.59179 1 0.441960 0.79332 1.18918 9 0.298521
  1. Emboldened probabilities show significant DIF. Shaded items are those that were deleted.
  2. Item numbers correspond to the order of items in WEMWBS (additional file 1)