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Table 2 Internal consistency and test-retest reliability and values of the HDQ (n = 91)

From: Headache Disability Questionnaire: cross-cultural adaptation and validation of the Turkish version

 

ICC

SEM

MDC

Cronbach’s α

Baseline mean ± SD

Retest mean ± SD

p

HDQ

0.842

5.89

16.33

0.914

44.00 ± 14.03

41.60 ± 15.54

0.013

  1. ICC: Intraclass Correlation Coefficients; SEM: Standard Error Measurement; MDC: Minimal Detectable Change; SD: Standard deviation; HDQ: Headache Disability Questionnaire