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Table 2 Inter-item correlations (internal consistency reliability) of the interviewer and self-administered format for baseline scores

From: Self-administration and interviewer-administration of the German Chronic Respiratory Questionnaire: instrument development and assessment of validity and reliability in two randomised studies

DOMAIN GERMAN CRQ-IA (n = 33) GERMAN CRQ-SA (n = 38)
Standardised Dyspnoea items 0.73 0.78
Fatigue items 0. 81 0.83
Emotional Function items 0.77 0.89
Mastery items 0.76 0.86
  1. † Crohnbach's alpha. CRQ-IA = Interviewer administered Chronic Respiratory Questionnaire. CRQ-SA = Self-administered Chronic Respiratory Questionnaire