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Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials
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| Zeitschriftentitel: | PeerJ |
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| Personen und Körperschaften: | , , , , , |
| In: | PeerJ, 6, 2018, S. e5318 |
| Format: | E-Article |
| Sprache: | Englisch |
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Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. |
|---|---|
| author |
Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. |
| spellingShingle |
Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. PeerJ Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials General Agricultural and Biological Sciences General Biochemistry, Genetics and Molecular Biology General Medicine General Neuroscience |
| author_sort |
braithwaite, felicity a. |
| spelling |
Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. 2167-8359 PeerJ General Agricultural and Biological Sciences General Biochemistry, Genetics and Molecular Biology General Medicine General Neuroscience http://dx.doi.org/10.7717/peerj.5318 <jats:sec> <jats:title>Background</jats:title> <jats:p>Blinding is critical to clinical trials because it allows for separation of specific intervention effects from bias, by equalising all factors between groups except for the proposed mechanism of action. Absent or inadequate blinding in clinical trials has consistently been shown in large meta-analyses to result in overestimation of intervention effects. Blinding in dry needling trials, particularly blinding of participants and therapists, is a practical challenge; therefore, specific effects of dry needling have yet to be determined. Despite this, dry needling is widely used by health practitioners internationally for the treatment of pain. This review presents the first empirical account of the influence of blinding on intervention effect estimates in dry needling trials. The aim of this systematic review was to determine whether participant beliefs about group allocation relative to actual allocation (blinding effectiveness), and/or adequacy of blinding procedures, moderated pain outcomes in dry needling trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>Twelve databases (MEDLINE, EMBASE, AMED, Scopus, CINAHL, PEDro, The Cochrane Library, Trove, ProQuest, trial registries) were searched from inception to February 2016. Trials that compared active dry needling with a sham that simulated dry needling were included. Two independent reviewers performed screening, data extraction, and critical appraisal. Available blinding effectiveness data were converted to a blinding index, a quantitative measurement of blinding, and meta-regression was used to investigate the influence of the blinding index on pain. Adequacy of blinding procedures was based on critical appraisal, and subgroup meta-analyses were used to investigate the influence of blinding adequacy on pain. Meta-analytical techniques used inverse-variance random-effects models.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>The search identified 4,894 individual publications with 24 eligible for inclusion in the quantitative syntheses. In 19 trials risk of methodological bias was high or unclear. Five trials were adequately blinded, and blinding was assessed and sufficiently reported to compute the blinding index in 10 trials. There was no evidence of a moderating effect of blinding index on pain. For short-term and long-term pain assessments pooled effects for inadequately blinded trials were statistically significant in favour of active dry needling, whereas there was no evidence of a difference between active and sham groups for adequately blinded trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Discussion</jats:title> <jats:p>The small number and size of included trials meant there was insufficient evidence to conclusively determine if a moderating effect of blinding effectiveness or adequacy existed. However, with the caveats of small sample size, generally unclear risk of bias, statistical heterogeneity, potential publication bias, and the limitations of subgroup analyses, the available evidence suggests that inadequate blinding procedures could lead to exaggerated intervention effects in dry needling trials.</jats:p> </jats:sec> Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials PeerJ |
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| title |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_unstemmed |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_full |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_fullStr |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_full_unstemmed |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_short |
Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_sort |
effectiveness and adequacy of blinding in the moderation of pain outcomes: systematic review and meta-analyses of dry needling trials |
| topic |
General Agricultural and Biological Sciences General Biochemistry, Genetics and Molecular Biology General Medicine General Neuroscience |
| url |
http://dx.doi.org/10.7717/peerj.5318 |
| publishDate |
2018 |
| physical |
e5318 |
| description |
<jats:sec>
<jats:title>Background</jats:title>
<jats:p>Blinding is critical to clinical trials because it allows for separation of specific intervention effects from bias, by equalising all factors between groups except for the proposed mechanism of action. Absent or inadequate blinding in clinical trials has consistently been shown in large meta-analyses to result in overestimation of intervention effects. Blinding in dry needling trials, particularly blinding of participants and therapists, is a practical challenge; therefore, specific effects of dry needling have yet to be determined. Despite this, dry needling is widely used by health practitioners internationally for the treatment of pain. This review presents the first empirical account of the influence of blinding on intervention effect estimates in dry needling trials. The aim of this systematic review was to determine whether participant beliefs about group allocation relative to actual allocation (blinding effectiveness), and/or adequacy of blinding procedures, moderated pain outcomes in dry needling trials.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Methods</jats:title>
<jats:p>Twelve databases (MEDLINE, EMBASE, AMED, Scopus, CINAHL, PEDro, The Cochrane Library, Trove, ProQuest, trial registries) were searched from inception to February 2016. Trials that compared active dry needling with a sham that simulated dry needling were included. Two independent reviewers performed screening, data extraction, and critical appraisal. Available blinding effectiveness data were converted to a blinding index, a quantitative measurement of blinding, and meta-regression was used to investigate the influence of the blinding index on pain. Adequacy of blinding procedures was based on critical appraisal, and subgroup meta-analyses were used to investigate the influence of blinding adequacy on pain. Meta-analytical techniques used inverse-variance random-effects models.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Results</jats:title>
<jats:p>The search identified 4,894 individual publications with 24 eligible for inclusion in the quantitative syntheses. In 19 trials risk of methodological bias was high or unclear. Five trials were adequately blinded, and blinding was assessed and sufficiently reported to compute the blinding index in 10 trials. There was no evidence of a moderating effect of blinding index on pain. For short-term and long-term pain assessments pooled effects for inadequately blinded trials were statistically significant in favour of active dry needling, whereas there was no evidence of a difference between active and sham groups for adequately blinded trials.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Discussion</jats:title>
<jats:p>The small number and size of included trials meant there was insufficient evidence to conclusively determine if a moderating effect of blinding effectiveness or adequacy existed. However, with the caveats of small sample size, generally unclear risk of bias, statistical heterogeneity, potential publication bias, and the limitations of subgroup analyses, the available evidence suggests that inadequate blinding procedures could lead to exaggerated intervention effects in dry needling trials.</jats:p>
</jats:sec> |
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| author | Braithwaite, Felicity A., Walters, Julie L., Li, Lok Sze Katrina, Moseley, G. Lorimer, Williams, Marie T., McEvoy, Maureen P. |
| author_facet | Braithwaite, Felicity A., Walters, Julie L., Li, Lok Sze Katrina, Moseley, G. Lorimer, Williams, Marie T., McEvoy, Maureen P., Braithwaite, Felicity A., Walters, Julie L., Li, Lok Sze Katrina, Moseley, G. Lorimer, Williams, Marie T., McEvoy, Maureen P. |
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| description | <jats:sec> <jats:title>Background</jats:title> <jats:p>Blinding is critical to clinical trials because it allows for separation of specific intervention effects from bias, by equalising all factors between groups except for the proposed mechanism of action. Absent or inadequate blinding in clinical trials has consistently been shown in large meta-analyses to result in overestimation of intervention effects. Blinding in dry needling trials, particularly blinding of participants and therapists, is a practical challenge; therefore, specific effects of dry needling have yet to be determined. Despite this, dry needling is widely used by health practitioners internationally for the treatment of pain. This review presents the first empirical account of the influence of blinding on intervention effect estimates in dry needling trials. The aim of this systematic review was to determine whether participant beliefs about group allocation relative to actual allocation (blinding effectiveness), and/or adequacy of blinding procedures, moderated pain outcomes in dry needling trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>Twelve databases (MEDLINE, EMBASE, AMED, Scopus, CINAHL, PEDro, The Cochrane Library, Trove, ProQuest, trial registries) were searched from inception to February 2016. Trials that compared active dry needling with a sham that simulated dry needling were included. Two independent reviewers performed screening, data extraction, and critical appraisal. Available blinding effectiveness data were converted to a blinding index, a quantitative measurement of blinding, and meta-regression was used to investigate the influence of the blinding index on pain. Adequacy of blinding procedures was based on critical appraisal, and subgroup meta-analyses were used to investigate the influence of blinding adequacy on pain. Meta-analytical techniques used inverse-variance random-effects models.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>The search identified 4,894 individual publications with 24 eligible for inclusion in the quantitative syntheses. In 19 trials risk of methodological bias was high or unclear. Five trials were adequately blinded, and blinding was assessed and sufficiently reported to compute the blinding index in 10 trials. There was no evidence of a moderating effect of blinding index on pain. For short-term and long-term pain assessments pooled effects for inadequately blinded trials were statistically significant in favour of active dry needling, whereas there was no evidence of a difference between active and sham groups for adequately blinded trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Discussion</jats:title> <jats:p>The small number and size of included trials meant there was insufficient evidence to conclusively determine if a moderating effect of blinding effectiveness or adequacy existed. However, with the caveats of small sample size, generally unclear risk of bias, statistical heterogeneity, potential publication bias, and the limitations of subgroup analyses, the available evidence suggests that inadequate blinding procedures could lead to exaggerated intervention effects in dry needling trials.</jats:p> </jats:sec> |
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| spelling | Braithwaite, Felicity A. Walters, Julie L. Li, Lok Sze Katrina Moseley, G. Lorimer Williams, Marie T. McEvoy, Maureen P. 2167-8359 PeerJ General Agricultural and Biological Sciences General Biochemistry, Genetics and Molecular Biology General Medicine General Neuroscience http://dx.doi.org/10.7717/peerj.5318 <jats:sec> <jats:title>Background</jats:title> <jats:p>Blinding is critical to clinical trials because it allows for separation of specific intervention effects from bias, by equalising all factors between groups except for the proposed mechanism of action. Absent or inadequate blinding in clinical trials has consistently been shown in large meta-analyses to result in overestimation of intervention effects. Blinding in dry needling trials, particularly blinding of participants and therapists, is a practical challenge; therefore, specific effects of dry needling have yet to be determined. Despite this, dry needling is widely used by health practitioners internationally for the treatment of pain. This review presents the first empirical account of the influence of blinding on intervention effect estimates in dry needling trials. The aim of this systematic review was to determine whether participant beliefs about group allocation relative to actual allocation (blinding effectiveness), and/or adequacy of blinding procedures, moderated pain outcomes in dry needling trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>Twelve databases (MEDLINE, EMBASE, AMED, Scopus, CINAHL, PEDro, The Cochrane Library, Trove, ProQuest, trial registries) were searched from inception to February 2016. Trials that compared active dry needling with a sham that simulated dry needling were included. Two independent reviewers performed screening, data extraction, and critical appraisal. Available blinding effectiveness data were converted to a blinding index, a quantitative measurement of blinding, and meta-regression was used to investigate the influence of the blinding index on pain. Adequacy of blinding procedures was based on critical appraisal, and subgroup meta-analyses were used to investigate the influence of blinding adequacy on pain. Meta-analytical techniques used inverse-variance random-effects models.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>The search identified 4,894 individual publications with 24 eligible for inclusion in the quantitative syntheses. In 19 trials risk of methodological bias was high or unclear. Five trials were adequately blinded, and blinding was assessed and sufficiently reported to compute the blinding index in 10 trials. There was no evidence of a moderating effect of blinding index on pain. For short-term and long-term pain assessments pooled effects for inadequately blinded trials were statistically significant in favour of active dry needling, whereas there was no evidence of a difference between active and sham groups for adequately blinded trials.</jats:p> </jats:sec> <jats:sec> <jats:title>Discussion</jats:title> <jats:p>The small number and size of included trials meant there was insufficient evidence to conclusively determine if a moderating effect of blinding effectiveness or adequacy existed. However, with the caveats of small sample size, generally unclear risk of bias, statistical heterogeneity, potential publication bias, and the limitations of subgroup analyses, the available evidence suggests that inadequate blinding procedures could lead to exaggerated intervention effects in dry needling trials.</jats:p> </jats:sec> Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials PeerJ |
| spellingShingle | Braithwaite, Felicity A., Walters, Julie L., Li, Lok Sze Katrina, Moseley, G. Lorimer, Williams, Marie T., McEvoy, Maureen P., PeerJ, Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials, General Agricultural and Biological Sciences, General Biochemistry, Genetics and Molecular Biology, General Medicine, General Neuroscience |
| title | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_full | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_fullStr | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_full_unstemmed | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_short | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| title_sort | effectiveness and adequacy of blinding in the moderation of pain outcomes: systematic review and meta-analyses of dry needling trials |
| title_unstemmed | Effectiveness and adequacy of blinding in the moderation of pain outcomes: Systematic review and meta-analyses of dry needling trials |
| topic | General Agricultural and Biological Sciences, General Biochemistry, Genetics and Molecular Biology, General Medicine, General Neuroscience |
| url | http://dx.doi.org/10.7717/peerj.5318 |