Are randomised trials valid externally? A comparison of patient characteristics and outcomes in an observational study and a randomised trial of acupuncture in patients with migraine

Authors :: Klaus Linde
Andrea Streng
Dieter Melchart
Andrea Hoppe
Wolfgang Weidenhammer
Source :: Focus on Alternative and Complementary Therapies. 9:53-53
Publication Year :: 2010
Publisher :: Wiley, 2010.

Subjects :: medicine.medical_specialty
Complementary and alternative medicine
Migraine
business.industry
Acupuncture
Physical therapy
medicine
Patient characteristics
Observational study
In patient
Cluster randomised controlled trial
medicine.disease
business

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