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Table 2 Eligibility criteria

From: Effect of different orthotic materials on plantar pressures: a systematic review

Inclusion criteria:
 • studies that evaluated the effects of flat insoles constructed from different materials on plantar pressures;
 • studies published in English;
 • studies that compared to a control (shoe alone) condition;
 • studies that used ‘in-shoe’ testing apparatus.
Exclusion criteria:
 • studies conducted on animals (non-humans);
 • studies that evaluated cadavers;
 • studies conducted on children (aged under 18 years);
 • studies that evaluated the effects of taping, padding, splinting, bracing, casting, contoured foot orthoses or insoles, or orthopaedic devices defined as other than flat foot orthoses or insoles;
 • studies of activities other than walking;
 • studies where participants had systemic, neurological or inflammatory arthritic pathologies such as diabetes mellitus, cerebrovascular accident, Parkinson’s disease, and rheumatoid arthritis;
 • studies that were not peer-reviewed, scholarly publications of experimental or quasi-experimental research.