Longitudinal outcome of XXXX : a 5-year epidemiologic study of muscle disorders defined by research diagnostic criteria for @entity2956 .

@entity1 @entity9321 @entity2956 @entity20683 @entity2531 @entity158 @entity1348
AIMS: To investigate the course of @entity158 defined by Research Diagnostic Criteria for @entity2956 ( @entity20683 / @entity9321 ) over a period of 5 years, and to identify prognostic factors from baseline data. METHODS: Subjects were 155 consecutive @entity1 and 80 community cases identified from an age-stratified representative population sample; all met the primary selection criterion of reporting @entity158 in the @entity1348 ( @entity1348 ) or masticatory muscles. The 2 groups were combined to yield a total sample of 235 subjects (50 male, 185 female; mean age = 39 years). Subjects were evaluated at baseline, 1 year, 3 years, and 5 years by trained examiners using standardized, reliable methods. Psychological and behavioral factors were assessed by self report. RESULTS: According to @entity20683 / @entity9321 criteria, 50 (31%) of the 165 subjects presenting with @entity158 ( @entity158 ) at baseline continued to have their disorder over a period of 5 years; 55 (33%) remitted, and 60 (36%) were recurrent cases. Bivariate statistics and multivariate logistic regression analyses indicated that baseline @entity158 frequency, number of painful palpation sites, and total number of body sites with @entity158 were significant predictors of persistent vs remitted and recurrent cases. No predictors that distinguished remission vs recurrence could be identified. Thirty subjects from the 70 without a diagnosis of @entity158 at baseline developed a new @entity158 . A high baseline @entity2531 score (without @entity158 items) was a significant risk factor for onset of @entity158 . CONCLUSION: Muscle disorders classified by @entity20683 / @entity9321 are predominantly chronic or fluctuating @entity158 conditions, with a modest probability (31%) of remission.
