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Table 18 Grading of HALT-90a

From: Aids to management of headache disorders in primary care (2nd edition)

Days lost in last 3 months Assessed impact Grade (indicating increasing need for medical care)
0–5 Minimal or infrequent I
6–10 Mild or infrequent II
11–20 Moderate III (indicates high need for care)
≥20 Severe IV (indicates high need for care)
  1. aFollowing the grading of MIDAS [7]