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How strong is the evidence that conservative treatment reduces pain and improves function in individuals with patellar tendinopathy? A systematic review of randomised controlled trials including GRADE recommendations
  1. Luciana De Michelis Mendonça1,2,
  2. Hércules R Leite1,2,
  3. Johannes Zwerver3,
  4. Nicholas Henschke4,
  5. Guilherme Branco2,
  6. Vinicius Cunha Oliveira1,2
  1. 1Physical Therapy Department, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, Minas Gerais, Brazil
  2. 2Programa de Pós Graduação em Reabilitação e Desempenho Funcional, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
  3. 3Department of Sport and Exercise Medicine, University of Groningen, Groningen, The Netherlands
  4. 4School of Public Health - Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
  1. Correspondence to Dr Luciana De Michelis Mendonça, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina 39803-371, Brazil; lucianademichelis{at}yahoo.com.br

Abstract

Objective To determine the effectiveness of conservative treatment (CT) on pain and function in patients with patellar tendinopathy (PT) compared with minimal intervention (MI) or other invasive intervention, or in addition to decline eccentric squat.

Methods Searches were performed in MEDLINE, Embase, Cochrane, PEDro, SPORTDiscus, CINAHL and AMED databases. All randomised trials that evaluated CT (any intervention not involving invasive procedures or medication) in individuals with PT were included. Two reviewers screened studies, extracted data and assessed risk of bias of all included studies. Where suitable, meta-analyses were conducted; we assessed certainty of the evidence using GRADE methodology.

Results When compared with MI, CT did not improve pain (weighted mean difference (WMD) −2.6, 95% CI −6.5 to 1.2) or function (WMD 1.8, 95% CI −2.4 to 6.1) in the short-term (up to 3 months) follow-up. When compared with invasive intervention, CT did not improve pain (WMD 0.7, 95% CI −0.1 to 1.4) or function (WMD −6.6, 95% CI −13.3 to 0.2) in the short-term follow-up. No overall effects were found for combined CT (when a conservative intervention was added to decline eccentric squat) on pain (WMD −0.5, 95% CI −1.4 to 0.4) or function (WMD −2.3, 95 % –9.1 to 4.6) at short-term follow-up. Single studies showed an effect on pain with iontophoresis at short-term follow-up (d = 2.42) or dry needling at medium/long-term follow-up (d = 1.17) and function with exercise intervention at medium/long-term follow-up (over 3 months) (d = 0.83).

Summary/Conclusion Our estimates of treatment effect have only low to very low certainty evidence to support them. This field of sports medicine/sports physiotherapy urgently needs larger, high-quality studies with pain and function among the potential primary outcomes.

  • injury
  • tendon
  • intervention
  • knee
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Footnotes

  • Correction notice This article has been corrected since it published Online First. The second author's name has been updated.

  • Contributors LDMM, HL, GB, VCO selected the trials and conducted the analysis. LDMM, HL, GB, VCO, JZ, NH interpreted the data and reviewed drafts.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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