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Outcomes and predictors of chronic daily headache (CDH) were determined in a two-year longitudinal study of a sample of 122 adolescents (32 male/90 female; ages 12–14) based on annual telephone follow-up by neurologists at Taipei Veterans General Hospital, Taiwan. CDH was defined as ≥15 headache days/month, average of two hours/day or more, for more than three months. All study patients met criteria for CDH at enrollment in 2000. Follow-up response rates were 92% in 2001 and 84% in 2002. Average monthly headache frequency for study patients was 11.0 ± 9.7 days during the first year of follow-up and 7.7 ± 6.5 days in the subsequent year. At the one-year follow-up, symptoms in 40% of study patients met criteria for CDH; by the year …
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