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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 deletedVariance of scale if the item is deletedCorrected items - total correlationCronbach’s alpha if the item is deleteda
Item 110.654302.3330.8320.661
Item 28.765538.8780.1340.851
Item 39.078288.6250.8460.653
Item 49.137523.0400.2030.842
Item 59.686287.6770.8780.639
  1. Item 1–5: questions in the MIDAS questionnaire
  2. aCronbach’s alpha value if the item is deleted from the analysis