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Table 3 Sensitivity, specificity and kappa value of questionnaire-based headache criteria sets

From: The HUNT4 study: the validity of questionnaire-based diagnoses

Category Sensitivity
n (%)
95% CI Specificity
n (%)
95% CI Kappa
value
95% CI
Headache
 Headache sufferinga 40/42 (95) 89–100 131/182 (72) 65–79 0.46 0.33–0.59
 Headache sufferinga > 1 day/month 38/42 (90) 81–99 146/182 (80) 74–86 0.55 0.41–0.69
 Headachea > 15 days/month 3/8 (38) 0–81 212/216 (98) 92–100 0.38 0.15–0.61
 Headachea > 15 days/month with MOHb 1/2 (50) 0–100 222/222 (100) 99–100 0.67 0.02–1.00
Migraine
 Self-reported lifetime migrainec 42/71 (59) 42–72 151/152 (99) 98–100 0.65 0.55–0.75
 Self-reported migraine during last year 21/42 (50) 34–66 177/182 (97) 95–99 0.55 0.39–0.71
 Restrictived migraine during last year 20/42 (48) 32–63 170/182 (93) 90–96 0.45 0.28–0.62
 Restrictived migraine > 1 day/month 16/32 (50) 32–68 182/192 (94) 91–97 0.49 0.30–0.68
 Restrictived migraine with visual aura 7/21 (33) 11–55 191/203 (94) 91–97 0.29 0.03–0.55
 Liberale migraine during last year 27/42 (64) 49–79 169/182 (93) 90–96 0.58 0.43–0.73
Tension-type headache (TTH)f
 TTH > 1 day/month 14/14 (100) 95–100 154/210 (73) 68–78 0.33 0.17–0.49
 TTH > 15 days/month without MOH 1/6 (17) 0–60 218/218 (100) 99–100 0.28 0.00–0.90
  1. a Comparing answers of the screening question: “Have you suffered from headache during the last year” in the questionnaire and in the interview
  2. b MOH Medication overuse headache): Use of analgesics ≥4 times per week during the last month
  3. c Comparing questionnaire-based information about lifetime migraine with confirmed diagnoses of previous or active migraine in the interview
  4. d ICHD-3 modified migraine criteria (accepted duration less than 4 h)
  5. e Self-reported migraine, or fulfilled the restrictive criteria
  6. fTension-type headache (without co-existence of migraine)
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