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Table 1 Characteristics of study participants at baseline (N = 1,384)

From: Validation of the Headache Impact Test (HIT-6) in patients with chronic migraine

Characteristics Study 1 Study 2
(n = 679) (n = 705)
Age (years), mean (SD) 41.7 (10.5) 41.0 (10.6)
Gender, n (% female) 594 (87.5) 602 (85.4)
Race     
  Caucasian 614 (90.4) 633 (89.8)
  Black 30 (4.4) 44 (6.2)
  Hispanic 29 (4.3) 17 (2.4)
  Asian 3 (0.4) 4 (0.6)
  Other 3 (0.4) 7 (1.0)
Migraine Characteristics     
  Years since frequent migraine onset, mean (SD) 20.4 (13.0) 18.0 (12.1)
  Number of headache days during the 28 day baseline period, mean (SD) 19.9 (3.7) 19.8 (3.6)
  Number of migraine days in a 28-day period, mean (SD) 16.5 (5.8) 16.3 (5.8)
  Number of migraine/probable migraine days in a 28-day period, mean (SD) 19.1 (4.0) 18.9 (4.0)
  Cumulative hours of headache in a 28-day period, mean (SD) 285.3 (114.3) 291.6 (119.6)
HIT-6a, mean (SD) 65.6 (4.0) 65.3 (4.4)
MSQb     
  Role function - preventive 55.4 (21.0) 56.7 (21.9)
  Role function - restrictive 37.8 (16.8) 39.4 (17.0)
  Emotional function 40.3 (24.1) 44.1 (24.8)
  1. aHIT-6 varies between 36 and 78, with higher scores indicating higher headache impact. Of the 1,384 patients enrolled, 1,376 participants (n = 672 for Study 1 and n = 704 for Study 2) had HIT-6 scores at baseline.
  2. bThe MSQ total and scale score varies between 0 and 100, with higher scores indicating less impact.
  3. HIT-6 = Headache Impact Test-6; MSQ = Migraine-Specific Questionnaire.