Skip to main content

Table 1 Analysis of variance of residuals for test of DIF between genders as well as tests of class interval fit based on data from 1985 to 2014; number of class intervals = 10

From: Recent advances in analysis of differential item functioning in health research using the Rasch model

  

F-values

Probability values

Item label

Class interval

Gender

Gender by class interval

Class interval

Gender

Gender by class interval

Sleeping difficulties

0.70234

16.30693

−0.31603

0.707171

0.000043

0.999999

Dizzy

0.71354

1.18359

0.47319

0.679772

0.276895

0.875555

Headache

0.55131

10.15275

−0.06779

0.837156

0.001488

0.999999

Stomach ache

1.82150

39.77340

−0.89707

0.060650

0.000000

0.999999

Backache

1.86562

10.77054

−0.49054

0.053570

0.001070

0.999999

Feeling low

4.57403

33.15276

−1.50452

0.000012

0.000000

0.999999

Irritable/Bad temper

2.54980

0.04370

0.22978

0.006781

0.834472

0.990252

Nervous

0.13520

0.97861

0.05255

0.997656

0.322801

0.999930

  1. Original set of 8 items. Adjusted sample size for test of fit (n = 960). Bonferroni adjusted significance level: 0.002083. Items showing significant p-values marked in italics
Back to article page

Health and Quality of Life Outcomes

ISSN: 1477-7525

Contact us