• Errors in study inclusion or omission of relevant studies
Article Type
Editorial
Article Subtype
Comment/letter
First Author Country
Japan
Aim
A letter to the editor highlighting flaws in the conduct of one systematic review of drugs for treating opioid-induced constipation published in 2018.
Level of Investigation
Descriptive
Summary of Findings
The author highlights that two relevant studies were erroneously missed from the systematic review and that inclusion of these studies are likely to impact the findings of the subsequent meta-analysis. The authors of the systematic review in question reply to the letter to confirm that the studies were inexplicably missed and the review requires updating.
Number of systematic reviews included
1
Number of eligible systematic reviews assessed
1
Treatment impacted
No
Treatment impacted description
Interpretation impacted
Not Applicable
Interpretation impacted description
Does the article have a publicly available protocol?
No
Did the review team include both methodological and clinical experts?
No
Sampling strategy for obtaining the systematic reviews under assessment
Pre Selected
Was the sample size of systematic reviews subject to any formal sample size or power calculation?
No
Were any or all of the study selection and data extraction performed in duplicate?
Not Applicable
Were any statistical adjustments made to correct for confounding?
Not Applicable
Are the methods of the article described in enough detail to replicate the study?
