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Table 2 Test-retest results presented as the Intraclass Correlation Coefficient, ICC, for the 6 items of the new symptoms scale AF6 and for the SF-36 domains.

From: Validity and reliability of a new, short symptom rating scale in patients with persistent atrial fibrillation

 

ICC (AF at 12 ± 3 days)

Lower 95% CI limit for ICC

New symptoms scale

  

Dyspnoea at rest

0.82

0.61

Dyspnoea on exertion

0.88

0.72

Limitations in daily life due to AF

0.19

Neg

Discomfort due to AF

0.04

Neg

Fatigue due to AF

0.39

Neg

Anxiety due to AF

0.93

0.83

SF-36 domains

  

Physical functioning

0.84

0.64

Role – Physical

0.56

0.17

Bodily pain

0.50

0.09

General Health

0.75

0.45

Vitality

0.77

0.49

Social functioning

0.54

0.14

Role – Emotional

0.57

0.18

Mental Health

0.95

0.10

  1. In general, the ICC values of AF6 are lower than the SF-36 values