TY - JOUR AU - Taylor, Frederick R. AB - Recent efforts to make headache diagnostic classification and clinical trial methodology more consistent provide valuable advice to trialists generating new evidence on effectiveness of treatments for headache; however, interpreting older trials that do not conform to new standards remains problematic. Systematic reviewers seeking to utilize historical data can adapt currently recommended diagnostic classification and clinical trial methodological approaches to interpret all available data relative to current standards. In evaluating study populations, systematic reviewers can: TI - Methodological Issues in Systematic Reviews of Headache Trials: Adapting Historical Diagnostic Classifications and Outcome Measures to Present‐Day Standards JF - Headache: The Journal of Head and Face Pain DO - 10.1111/j.1526-4610.2005.05097.x DA - 2005-05-01 UR - https://www.deepdyve.com/lp/wiley/methodological-issues-in-systematic-reviews-of-headache-trials-E0ZNBtaJQe SP - 459 EP - 465 VL - 45 IS - 5 DP - DeepDyve ER -