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Table 3 Statistics of 5-D itch scale according to numerical rating scale (NRS)

From: Transformation of 5-D itch scale and numerical rating scale in chronic hemodialysis patients

NRS categories 5-D itch scale
n Mean ± SD Min Max
No pruritus (0) 100 6.4 ± 1.5 5 9
Mild (1–3) 133 9.6 ± 2.2 5 17
Moderate (4–6) 107 13.1 ± 3.2 7 21
Severe (7–8) 39 15.7 ± 4.4 9 25
Very severe (≥9) 30 19.5 ± 4.4 5 25
  1. NRS numerical rating scale