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Table 5 Summary of the measurement properties

From: Development of a questionnaire to measure health-related quality of life (HRQoL) in patients with atrial fibrillation (AF-QoL)

  AF-Qol401 AF-Qol182 AF-Qol73 AF-Qol114
N° items 40 18 7 11
Score distribution     
   Observations 96 97 106 97
   Mean 39.41 38.87 39.59 38.03
   SD 20.48 21.53 26.58 23.69
   Percentile 50 36.56 37.50 33.93 36.36
   % score 0 1 (0.9%) 3 (2.7%) 4 (3.6%) 4 (3.6)
   % score 100 0 0 2 (1.8%) 0
   Item total correlation 0.40–0.76 0.45–0.76 0.74–0.85 0.56–0.76
   Reliability 0.956 0.915 0.901 0.891
Rasch analysis     
   Person separation 3.89 2.55 2.12 2.17
   Person reliability 0.94 0.87 0.82 0.82
  1. 1 Preliminary and unreduced questionnaire
  2. 2 Reduced questionnaire after the Rasch analysis
  3. 3 Psychological domain items
  4. 4 Physical domain items