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Table 2 Cronbach's α for QOLRAD questionnaire domains at visit 1 (baseline).

From: Psychometric validation of the Dutch translation of the quality of life in reflux and dyspepsia (QOLRAD) questionnaire in patients with gastroesophageal reflux disease

QOLRAD domains

Cronbach's α*

Emotional distress

0.92

Sleep disturbance

0.91

Food/drink problems

0.87

Physical/social functioning

0.85

Vitality

0.83

  1. *A high α coefficient (≥ 0.70) suggests good internal consistency and reliability [16].
  2. QOLRAD, Quality of Life in Reflux and Dyspepsia.
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Health and Quality of Life Outcomes

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