Table 2. Distribution of positive responses to each item of the CHSQ according to the finally diagnosed headache types.
| Item | CH (n=42) | Migraine (n=207) | TTH or PSH (n=91) | p* (CH vs. Migraine) |
|---|---|---|---|---|
| 1. Headache improves within 3 hours | 35 (83.3) | 21 (10.1) | 18 (19.8) | <0.001 |
| 2. Headache is accompanied by conjunctival injection and/or tearing on the headache side | 31 (73.8) | 16 (7.7) | 2 (2.2) | <0.001 |
| 3. Headache is accompanied by nasal congestion and/or rhinorrhea on the headache side | 16 (38.1) | 7 (3.4) | 0 | <0.001 |
| 4. Headache is accompanied by sense of restlessness or agitation | 35 (83.3) | 43 (20.8) | 3 (3.3) | <0.001 |
| 5. Headache is unilateral on the right or left side | 38 (90.5) | 104 (50.2) | 26 (28.6) | <0.001 |
| 6. Headache limits you from doing what you need to do | 41 (97.6) | 140 (67.6) | 16 (17.6) | <0.001 |
| 7. Headache is accompanied by nausea and/or stomach sickness | 31 (73.8) | 167 (80.7) | 28 (30.8) | 0.315 |
| 8. Headache worsens when around light | 26 (61.9) | 118 (57.0) | 14 (15.4) | 0.558 |
| 9. Headache is repeated intensively for over a week | 37 (88.1) | 59 (28.5) | 28 (30.8) | <0.001 |
| 10. Headache recurs more than three times weekly | 36 (85.7) | 96 (46.4) | 49 (53.9) | <0.001 |
Data are n (%) values. Items answered on the Likert scale (items 1 to 5) were transformed into a dichotomous scale for the analysis (never, rarely, or sometimes vs. frequently). Detailed responses are presented in Supplementary Table 1 in the online-only Data Supplement.
*p values of all items among three groups and between CH and TTH or PSH were <0.001.
CH: cluster headache, CHSQ: Cluster Headache Screening Questionnaire, PSH: primary stabbing headache, TTH: tension-type headache.