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Table 2 Test–retest reliability between baseline and C1D15 (n = 17)

From: Psychometric evaluation of the Indolent Systemic Mastocytosis Symptom Assessment Form (ISM-SAF) in a phase 2 clinical study

ISM-SAF items/domains

n

ICC (95% confidence interval)a

Total Symptom Score

16

0.956

Gastrointestinal Symptom Score

16

0.858

Skin Symptom Score

17

0.981

Q1. Bone pain

17

0.867

Q2. Abdominal pain

17

0.935

Q3. Nausea

17

0.858

Q4. Spots

17

0.986

Q5. Itching

17

0.949

Q6. Flushing

17

0.959

Q7. Fatigue

17

0.878

Q8. Dizziness

17

0.936

Q9. Brain fog

17

0.917

Q10. Headache

17

0.944

Q11. Diarrhea frequency

17

0.932

Q12. Diarrhea severity

16

0.741

  1. C#D# cycle number, day number, ICC intraclass correlation coefficient, ISM-SAF Indolent Systemic Mastocytosis Symptom Assessment Form
  2. aThe ICC was computed using the single measurement, absolute agreement, two-way mixed effects model