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Table 3 Item reliability analysis

From: Validation of the Spanish version of the migraine disability assessment questionnaire (MIDAS) in university students with migraine

 

Average scale if the item is deleted

Variance of scale if the item is deleted

Corrected items - total correlation

Cronbach’s alpha if the item is deleteda

Item 1

10.654

302.333

0.832

0.661

Item 2

8.765

538.878

0.134

0.851

Item 3

9.078

288.625

0.846

0.653

Item 4

9.137

523.040

0.203

0.842

Item 5

9.686

287.677

0.878

0.639

  1. Item 1–5: questions in the MIDAS questionnaire
  2. aCronbach’s alpha value if the item is deleted from the analysis