Objectives
Clinical research is the bedrock of clinical innovation, education and practice. We characterized and critically appraised physiotherapy clinical research to avoid implementing misleading research findings into practice and to task the Nigerian physiotherapy societies on responsible conduct of clinical research.
Methods
This is a systematic review of articles published in English between 2009 and 2021. We searched Pubmed, Medline, Cumulative Index to Nursing and Allied Health Literature, Academic Search Complete, PsycINFO and African Journal Online, and reference lists of relevant articles. Data were selected and extracted according to predesigned eligibility criteria and using a standardized data extraction table. Where appropriate, the Pedro and Cochrane ROBINS1 were used to examine the risk of bias.
Results
Of the clinical experiments, the randomized controlled trial (RCT) was the most common design (87.5%). Musculoskeletal conditions (39.3%) were the most studied disorder. Most of the studies (76.8%) were of suboptimal quality. Interventions constituted exercise therapy (76.3%), manual therapy (8.5%) and electrotherapy (8.5%). More than half (67.8%) of the studies recorded medium to large effect sizes. A fair proportion (48.2%) of the studies had a confounding-by-indication bias. A few studies conducted normality tests (10.9%) and intention-to-treat analysis (37.5%).
Discussion
Of the clinical research, the volume of clinical experiments in the Nigeria Physiotherapy research community is small; notwithstanding, RCT is the most frequent clinical experiment. Physiotherapy interventions especially exercise appears effective, although incongruence between effect size and study quality limits inference. Sources of bias include absent/inadequate covariate analysis, blinding and intention-to-treat analysis approach.
Registration:
We registered the protocol with PROSPERO. The registration number: CRD42021228514.