PEDro - The Physiotherapy Evidence Database - is a database of randomised controlled trials, systematic reviews and evidence-based clinical practice guidelines in physiotherapy.  The project is supported by a cadre of international physiotherapy organizations including the American Physical Therapy Association.

Okay - it doesn’t contain physiotherapy-only studies - but all the information in the database is pertinent to physiotherapy.

The PEDro database has a bit of a twist:  the clinical trials have a score based on the PEDro Scale which attempts to provide a quality assessment of the study.  Clinical trials are given a rating based on a 10-point scale with specific definitions for each criterion.

The database is small but growing and might be just the place to get an answer to your therapy questions.