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A descriptive analysis of child-relevant systematic reviews in the Cochrane Database of Systematic Reviews
Simon Bow1, Jeffrey Klassen, Annabritt Chisholm
1Alberta Research Centre for Health Evidence, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.
Insights
This study analyzed child-relevant systematic reviews (SRs) in the Cochrane Database. Many reviews lack up-to-date information and child-specific data, highlighting gaps in evidence for pediatric care.
Area of Science:
- Medical Research
- Evidence Synthesis
- Pediatric Health
Background:
- Systematic reviews (SRs) are crucial for evidence-based decision-making.
- A comprehensive overview of child-relevant SRs is lacking.
- Understanding the scope of child-focused evidence is vital for identifying research gaps.
Purpose of the Study:
- To describe child-relevant SRs from the Cochrane Database of Systematic Reviews (CDSR).
- To assess the extent and characteristics of available child-relevant evidence in SRs.
- To identify potential gaps in the evidence base requiring new SRs.
Main Methods:
- Systematic reviews were identified from the CDSR (Issue 2, 2009).
- Relevance was assessed using pre-defined criteria.
- Data extraction and univariate analyses were performed to describe SR characteristics.
Main Results:
- 793 child-relevant SRs were included, with 38% last updated before 2007.
- Most SRs focused on pharmacological interventions (59%) and included a median of 7 studies.
- Only 48% of included studies exclusively focused on children, and publication bias was assessed in only 14%.
Conclusions:
- The study characterized the methodological quality of child-relevant SRs in the CDSR.
- Many SRs do not meet current Cochrane standards for being up-to-date.
- Variations in conduct and reporting limit clinicians' access to child-specific data.
Background:
Systematic reviews (SRs) are considered an important tool for decision-making. There has been no recent comprehensive identification or description of child-relevant SRs. A description of existing child-relevant SRs would help to identify the extent of available child-relevant evidence available in SRs and gaps in the evidence base where SRs are required. The objective of this study was to describe child-relevant SRs from the Cochrane Database of Systematic Reviews (CDSR, Issue 2, 2009).
Methods:
SRs were assessed for relevance using pre-defined criteria. Data were extracted and entered into an electronic form. Univariate analyses were performed to describe the SRs overall and by topic area.
Results:
The search yielded 1666 SRs; 793 met the inclusion criteria. 38% of SRs were last assessed as up-to-date prior to 2007. Corresponding authors were most often from the UK (41%). Most SRs (59%) examined pharmacological interventions. 53% had at least one external source of funding. SRs included a median of 7 studies (IQR 3, 15) and 679 participants (IQR 179, 2833). Of all studies, 48% included only children, and 27% only adults. 94% of studies were published in peer-reviewed journals. Primary outcomes were specified in 72% of SRs. Allocation concealment and the Jadad scale were used in 97% and 25% of SRs, respectively. Adults and children were analyzed separately in 12% of SRs and as a subgroup analysis in 14%. Publication bias was assessed in only 14% of SRs. A meta-analysis was conducted in 68% of SRs with a median of 5 trials (IQR 3, 9) each. Variations in these characteristics were observed across topic areas.
Conclusions:
We described the methodological characteristics and rigour of child-relevant reviews in the CDSR. Many SRs are not up-to-date according to Cochrane criteria. Our study describes variation in conduct and reporting across SRs and reveals clinicians' ability to access child-specific data.
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