The information extracted was the country of origin, year of publication, population characteristics and the prevalence estimates for headache, migraine, tension-type headache (TTH) and chronic headache, both overall and for each gender, and for various age categories.
Extracted data included year of publication, population and country of study, specific location, methodology, BBV, testing policy and main results.
We extracted several variables: authors, year of publication, population studied, number of patients, mean age and range, sex, disease duration, percentage methotrexate naive, previous immunosuppressive drug use, steroid use at baseline, folic acid or folinic acid usage, study design and duration, comparator drug, and adverse events.
A stream of publications from population surveillance sites reflects the match between population health approaches and the health systems research approach (6– 8).
19 In these publications, the population studied was either of a different ethnicity or had another type of cerebrovascular disease than our population with inherently different baseline risks of ICH.
Previous publications on population registers in other countries have indicated the relevance of these types of data (15– 22).
In an analysis that compares publications to population size as a gauge of significance, CAPS countries' health sector have been ranked as 'least studied' with only 0.16 1.71 publications per 100,000 population (24).
Two evaluations of the urine CCA test for S. mansoni were performed on data derived from two publications (total population 569, year of publication 1995).
A total of five evaluations of the serum CAA test for S. mansoni were performed on data derived from four publications (total population 1583, years of publication 1995 to 1998).
A total of three evaluations of the serum CAA test for S. haematobium were performed on data derived from three publications (total population 990, years of publication 1995 to 1999).
Here Tenow reinterprets the results of 5 publications of population outbreaks of winter moth and autumnal moth in Norway to show how interpretations could be different if the lag between the two species and the waves of outbreaks were considered.
