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. 2008 Apr 22;70(17):1525-33.
doi: 10.1212/01.wnl.0000310645.31020.b1.

Prevalence and characteristics of allodynia in headache sufferers: a population study

M E Bigal  1 , S Ashina, R Burstein, M L Reed, D Buse, D Serrano, R B Lipton; AMPP Group
Collaborators, Affiliations

Prevalence and characteristics of allodynia in headache sufferers: a population study

M E Bigal et al. Neurology. .

Abstract

Objective: The authors estimated the prevalence and severity of cutaneous allodynia (CA) in individuals with primary headaches from the general population.

Methods: We mailed questionnaires to a random sample of 24,000 headache sufferers previously identified from the population. The questionnaire included the validated Allodynia Symptom Checklist (ASC) as well as measures of headache features, disability, and comorbidities. We modeled allodynia as an outcome using headache diagnosis, frequency and severity of headaches, and disability as predictor variables in logistic regression. Covariates included demographic variables, comorbidities, use of preventive medication, and use of opioids.

Results: Complete surveys were returned by 16,573 individuals. The prevalence of CA of any severity (ASC score >or=3) varied with headache type. Prevalence was significantly higher in transformed migraine (TM, 68.3%) than in episodic migraine (63.2%, p < 0.01) and significantly elevated in both of these groups compared with probable migraine (42.6%), other chronic daily headaches (36.8%), and severe episodic tension-type headache (36.7%). The prevalence of severe CA (ASC score >or=9) was also highest in TM (28.5%) followed by migraine (20.4%), probable migraine (12.3%), other chronic daily headaches (6.2%), and severe episodic tension-type headache (5.1%). In the migraine and TM groups, prevalence of CA was higher in women and increased with disability score. Among migraineurs, CA increased with headache frequency and body mass index. In all groups, ASC scores were higher in individuals with major depression.

Conclusions: Cutaneous allodynia (CA) is more common and more severe in transformed migraine and migraine than in other primary headaches. Among migraineurs, CA is associated with female sex, headache frequency, increased body mass index, disability, and depression.

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Figures

Figure 1
Figure 1
Relative frequency and severity of cutaneous allodynia according to headache subtype CA = cutaneous allodynia; TM = transformed migraine; M = migraine; PM = probable migraine; O-CDH = other chronic daily headaches; ETTH = episodic tension-type headache.
Figure 2
Figure 2
Mean allodynia symptom checklist score, overall and by gender, in individuals with primary headache disorders TM = transformed migraine; PM = probable migraine; O-CDH = other chronic daily headaches; S-ETTH = severe episodic tension-type headache.
See this image and copyright information in PMC

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