RESUMO

The influence of prenatal events on the development of headaches at childhood has not been investigated and is the scope of our study. Of 2,173 children identified as the target sample, consents and analyzable data were provided by 1,440 (77%). Parents responded to a standardized questionnaire with a validated headache module and specific questions about prenatal exposures. Odds of chronic daily headache (CDH) were significantly higher when maternal tabagism was reported. When active and passive smoking were reported, odds ratio (OR) of CDH were 2.29 [95% confidence intervals (CI)=1.6 vs. 3.6)]; for active tabagism, OR=4.2 (95% CI=2.1-8.5). Alcohol use more than doubled the chance of CDH (24% vs. 11%, OR=2.3, 95% CI=1.2-4.7). In multivariate analyses, adjustments did not substantially change the smoking/CDH association. Prenatal exposure to tobacco and alcohol are associated with increased rates of CDH onset in preadolescent children.

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RESUMO

The influence of prenatal events on the development of headaches at childhood has not been investigated and is the scope of our study. Of 2,173 children identified as the target sample, consents and analyzable data were provided by 1,440 (77 percent). Parents responded to a standardized questionnaire with a validated headache module and specific questions about prenatal exposures. Odds of chronic daily headache (CDH) were significantly higher when maternal tabagism was reported. When active and passive smoking were reported, odds ratio (OR) of CDH were 2.29 [95 percent confidence intervals (CI)=1.6 vs. 3.6)]; for active tabagism, OR=4.2 (95 percent CI=2.1-8.5). Alcohol use more than doubled the chance of CDH (24 percent vs. 11 percent, OR=2.3, 95 percent CI=1.2-4.7). In multivariate analyses, adjustments did not substantially change the smoking/CDH association. Prenatal exposure to tobacco and alcohol are associated with increased rates of CDH onset in preadolescent children.

A influência de eventos pré-natais na fisiopatogenia das cefaleias na infância ainda não foi investigada e é o objetivo desse estudo. Da amostra-alvo de 2.173 crianças, um consentimento pós-informado e dados suficientes para as análises foram obtidos de 1.440 (77 por cento). Os pais responderam a um questionário padrão com um módulo de cefaleia validado na população brasileira e questões específicas sobre antecedentes pré-natais. O risco de cefaleia crônica diária (CCD) foi significativamente maior nas crianças cujas mães fumaram durante a gestação. Quando presentes tabagismo ativo e passivo, o risco (OR) de CCD foi de 2,29 [intervalo de confiança (IC) de 95 por cento=1,6-3,6)]; para tabagismo ativo, OR=4,2 (IC 95 por cento=2,1-8,5). O uso de álcool durante a gestação dobrou o risco de CCD (24 por cento vs. 11 por cento, OR=2,3, IC 95 por cento=1,2-4,7). Nas análises multivariadas, os ajustes não modificaram, substancialmente a associação entre tabagismo materno durante a gestação e CCD. A exposição pré-natal ao tabaco e ao álcool encontra-se associada à CCD de início na infância.

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The objective of the present study was to estimate the prevalence and relative risk of symptoms suggestive of childhood periodic syndrome in migraine, migraine subtypes, and tension-type headache, relative to control subjects. The target population was all children (age 5-12 years) enrolled in public elementary schools in one Brazilian city (n = 2173). Consent was obtained for 1994 children; analyzable data were available for 1906 children, for a final sample of 1113 children with migraine, tension-type headache, or no headache. Parents were interviewed using validated questionnaires. Headache diagnosis was assigned according to the International Classification of Headache Disorders, 2nd edition. Relative risk of symptoms was drawn by headache categories relative to controls. For episodic migraine, the relative risk of all symptoms except nocturnal enuresis was significantly increased: motion sickness, recurrent limb pain, recurrent abdominal pain, and parasomnias, such as sleep talking, somnambulism, and bruxism. For tension-type headache, only nocturnal enuresis and motion sickness were not more common than in controls. In multivariate analyses, any interictal symptom was independently associated with any headache (P < 0.001), migraine headaches (P < 0.001), and tension-type headaches (P < 0.01). These findings indicate that interictal symptoms suggestive of childhood periodic syndromes are common in the population, and are associated with migraine and specific migraine subtypes, but also with tension-type headache.

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OBJECTIVES: Primary headache syndromes (eg, migraine and tension-type headache [TTH]) and attention-deficit/hyperactivity disorder (ADHD) are prevalent in childhood and may cause impairment in social and academic functioning. We tested if ADHD or its symptoms are associated with specific headache syndromes or with headache frequency. STUDY DESIGN: Cross-sectional epidemiological study with direct interviews to parents and teachers using validated and standardized questionnaires. SETTING: Populational study. PARTICIPANTS: Children aged 5 to 11 years (n = 1856). OUTCOME MEASURES: Prevalence of ADHD as a function of headache status in crude and adjusted analyses. RESULTS: The prevalence of migraine was 3.76%. Infrequent episodic TTH occurred in 2.3% of the sample, and frequent episodic TTH occurred in 1.6%. The prevalence of ADHD was 6.1%. The prevalence of ADHD was not significantly different by headache category. For hyperactivity-impulsivity symptoms, the prevalence was 8.1% in children without headache, 23.7% in children with migraine (relative risk [RR], 2.6; 95% confidence interval [CI], 1.6-4.2), and 18.4% in children with probable migraine (RR, 2.1; 95% CI, 1.4-3.2). For inattention, no significant differences were seen. In multivariate analyses, ADHD or inattention symptoms were not predicted by headache subtypes or headache frequency. Hyperactivity-impulsivity symptoms were significantly associated with any headache (P < 0.01), TTH (P < 0.01), or migraine (P < 0.001). CONCLUSION: Migraine and TTH are not comorbid to ADHD overall, but are comorbid to hyperactive-impulsive behavior. Providers and educators should be aware of the association.

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The aim of this study was to estimate the prevalence of primary headaches in pre-adolescent children, as well as headache frequency and days of treatment in this population. Sample consisted of 1994 children (aged 5-12 years). Parents were interviewed by a paediatric headache specialist using a questionnaire that allowed the classification of headaches using the criteria of the Second Edition of the International Classification of Headache Disorders. The most severe headache type was classified (mutually-exclusive diagnoses). Prevalence and prevalence ratios were calculated overall, as well as by age, gender and race. The overall prevalence of migraine was 3.76%, non-significantly higher in boys (3.9%) than in girls (3.6%). Prevalence of probable migraine was significantly higher than the prevalence of migraine for all ages (overall prevalence of 17.1%). Chronic migraine (CM) happened in 0.8% (girls, 1.15%; boys, 0.5%). Infrequent episodic tension-type headache (ETTH) happened in 2.3% of the sample while prevalence of frequent ETTH was 1.6%. Probable TTH happened in 13.5%. Most children with migraine had consulted a medical doctor because of their headaches, and the proportion was higher among children with CM (93.7%). Prevalence of primary headaches is high in young children. Probable diagnoses are more common than full diagnoses. Consultation rates are elevated.

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