Headache disorders and public ill-health in India: prevalence estimates in Karnataka State.

BACKGROUND: Primary headache disorders are among the commonest disorders, affecting people in all countries. India appears to be no exception, although reliable epidemiological data on headache in this highly populous country are not available. Such information is needed for health-policy purposes. Our aim was to estimate the prevalence of each of the headache disorders of public-health importance, and examine their sociodemographic associations, in urban and rural populations of Karnataka, south India. METHODS: In a door-to-door survey, 2,329 biologically unrelated adults (aged 18-65 years) were randomly sampled from urban (n = 1,226) and rural (n = 1,103) areas in and around Bangalore and interviewed by trained researchers using a pilot-tested, validated, structured questionnaire. ICHD-II diagnostic criteria were applied. RESULTS: The observed 1-year prevalence of any headache was 63.9 %, with a female preponderance of 4:3. The age-standardised 1 year prevalence of migraine was 25.2%; prevalence was higher among females than males (OR: 2.1 [1.7-2.6]) and among those from rural areas than urban (OR = 1.5 [1.3-1.8]). The age-standardized 1 year prevalence of TTH was 35.1%, higher among younger people. The estimated prevalence of all headache on ≥15 days/month was 3.0%; that of pMOH was 1.2%, five-times greater among females than males and with a rural preponderance. CONCLUSIONS: There is a very high 1 year prevalence of migraine in south India (the mean global prevalence is estimated at 14.7%). Explanations probably lie in cultural, lifestyle and/or environmental factors, although the observed associations with female gender and rural dwelling are usual. Levels of TTH, pMOH and other headache on ≥15 days/month are similar to global averages, while the very strong association of pMOH with female gender requires explanation. Until another study is conducted in the north of the country, these are the best data available for health policy in a population of over 1.2 billion people.

Validation of a guideline-based decision support system for the diagnosis of primary headache disorders based on ICHD-3 beta.

BACKGROUND: China may have the largest population of headache sufferers and therefore the most serious burden of disease worldwide. However, the rate of diagnosis for headache disorders is extremely low, possibly due to the relative complexity of headache subtypes and diagnostic criteria. The use of computerized clinical decision support systems (CDSS) seems to be a better choice to solve this problem. METHODS: We developed a headache CDSS based on ICHD-3 beta and validated it in a prospective study that included 543 headache patients from the International Headache Center at the Chinese PLA General hospital, Beijing, China. RESULTS: We found that the CDSS correctly recognized 159/160 (99.4%) of migraine without aura, 36/36 (100%) of migraine with aura, 20/21 (95.2%) of chronic migraine, and 37/59 (62.7%) of probable migraine. This system also correctly identified 157/180 (87.2%) of patients with tension-type headache (TTH), of which infrequent episodic TTH was diagnosed in 12/13 (92.3%), frequent episodic TTH was diagnosed in 99/101 (98.0%), chronic TTH in 18/20 (90.0%), and probable TTH in 28/46 (60.9%). The correct diagnostic rates of cluster headache and new daily persistent headache (NDPH) were 90.0% and 100%, respectively. In addition, the system recognized 32/32 (100%) of patients with medication overuse headache. CONCLUSIONS: With high diagnostic accuracy for most of the primary and some types of secondary headaches, this system can be expected to help general practitioners at primary hospitals improve diagnostic accuracy and thereby reduce the burden of headache in China.

Race, psychiatric comorbidity, and headache characteristics in patients in headache subspecialty treatment clinics.

OBJECTIVE: This research examined how race, psychiatric comorbidity, and headache characteristics are inter-related in patients with severe headache disorders. DESIGN: This study used a naturalistic cohort design and assessed 114 Black and 173 White patients receiving treatment in headache subspecialty clinics in Cincinnati, Cleveland, Columbus, and Toledo, OH. Face-to-face interviews yielded headache and psychiatric diagnoses; 30-day daily diaries collected data on headache frequency, severity, and disability; and self-administered surveys obtained data on headache management self-efficacy, headache locus of control, and quality of life. RESULTS: Compared with Whites, Blacks reported more frequent and severe headaches, were more likely to be diagnosed with depressive disorders, and were more likely to be diagnosed with chronic headaches. White and Black patients diagnosed with both depression and anxiety reported the most frequent headache days per month and the lowest levels of life quality and headache management self-efficacy. CONCLUSIONS: Additional research on race, psychiatric comorbidity, and headache characteristics is needed that can inform culturally contextualized interventions for persons with severe headache disorders.

Websites offer helpful information concerning consultation with headache specialists.

Patients with severe primary headache may benefit from consultation with headache specialists, but doctor attendance rates in Japan are very low. More headache patients might consult headache specialists if these specialists were more widely recognized by the public. To determine what information prompted patients to seek consultation with a headache specialist, we questioned 256 primary headache patients about the source of the helpful information concerning consultation with headache specialists. From 191 patients, a total of 235 responses to the questionnaire were obtained. The most common response was 'websites' (33.2%), followed by 'professionals' (23.8%), 'acquaintances' (20.9%), 'print media' (6.8%) and 'TV/radio' (3.4%). Patients who indicated websites showed the most severe pain and highest impact of headache, and accounted for 52.4% of those with cluster headaches. Development of websites concerning headache specialists would seem likely to increase doctor attendance rates for patients with primary headache.