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Table 2 Modified national health and medical research council (NHMRC) hierarchy of evidence

From: Effectiveness of Pilates exercise in treating people with chronic low back pain: a systematic review of systematic reviews

Level Type of Intervention
I Systematic Review of Randomised Controlled Trials
II Randomised Controlled Trial
III Pseudo-Randomised Controlled Trial, Comparative Study with or without Concurrent Controls
IV Case Series with either post-test or pre-test/post-test outcomes
  1. * Adapted from NHMRC (2009) [1].