Accounting for Multiple Births in Neonatal and Perinatal Trials: Systematic Review and Case Study

Objectives To determine the prevalence in the neonatal literature of statistical approaches accounting for the unique clustering patterns of multiple births and to explore the sensitivity of an actual trial to several analytic approaches to multiples. Study design A systematic review of recent perin...

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Veröffentlicht in:The Journal of pediatrics 2010-02, Vol.156 (2), p.202-208
Hauptverfasser: Hibbs, Anna Maria, MD, MSCE, Black, Dennis, PhD, Palermo, Lisa, MA, Cnaan, Avital, PhD, Luan, Xianqun, MS, Truog, William E., MD, Walsh, Michele C., MD, MS, Ballard, Roberta A., MD
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container_end_page 208
container_issue 2
container_start_page 202
container_title The Journal of pediatrics
container_volume 156
creator Hibbs, Anna Maria, MD, MSCE
Black, Dennis, PhD
Palermo, Lisa, MA
Cnaan, Avital, PhD
Luan, Xianqun, MS
Truog, William E., MD
Walsh, Michele C., MD, MS
Ballard, Roberta A., MD
description Objectives To determine the prevalence in the neonatal literature of statistical approaches accounting for the unique clustering patterns of multiple births and to explore the sensitivity of an actual trial to several analytic approaches to multiples. Study design A systematic review of recent perinatal trials assessed the prevalence of studies accounting for clustering of multiples. The Nitric Oxide to Prevent Chronic Lung Disease (NO CLD) trial served as a case study of the sensitivity of the outcome to several statistical strategies. We calculated odds ratios using nonclustered (logistic regression) and clustered (generalized estimating equations, multiple outputation) analyses. Results In the systematic review, most studies did not describe the random assignment of twins and did not account for clustering. Of those studies that did, exclusion of multiples and generalized estimating equations were the most common strategies. The NO CLD study included 84 infants with a sibling enrolled in the study. Multiples were more likely than singletons to be white and were born to older mothers ( P < .01). Analyses that accounted for clustering were statistically significant; analyses assuming independence were not. Conclusions The statistical approach to multiples can influence the odds ratio and width of confidence intervals, thereby affecting the interpretation of a study outcome. A minority of perinatal studies address this issue.
doi_str_mv 10.1016/j.jpeds.2009.08.049
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Study design A systematic review of recent perinatal trials assessed the prevalence of studies accounting for clustering of multiples. The Nitric Oxide to Prevent Chronic Lung Disease (NO CLD) trial served as a case study of the sensitivity of the outcome to several statistical strategies. We calculated odds ratios using nonclustered (logistic regression) and clustered (generalized estimating equations, multiple outputation) analyses. Results In the systematic review, most studies did not describe the random assignment of twins and did not account for clustering. Of those studies that did, exclusion of multiples and generalized estimating equations were the most common strategies. The NO CLD study included 84 infants with a sibling enrolled in the study. Multiples were more likely than singletons to be white and were born to older mothers ( P &lt; .01). Analyses that accounted for clustering were statistically significant; analyses assuming independence were not. Conclusions The statistical approach to multiples can influence the odds ratio and width of confidence intervals, thereby affecting the interpretation of a study outcome. A minority of perinatal studies address this issue.</description><identifier>ISSN: 0022-3476</identifier><identifier>EISSN: 1097-6833</identifier><identifier>DOI: 10.1016/j.jpeds.2009.08.049</identifier><identifier>PMID: 19969305</identifier><identifier>CODEN: JOPDAB</identifier><language>eng</language><publisher>Maryland Heights, MO: Mosby, Inc</publisher><subject>Adult ; Bias ; Biological and medical sciences ; Bronchodilator Agents - therapeutic use ; Bronchopulmonary Dysplasia - prevention &amp; control ; Cluster Analysis ; Confidence Intervals ; Data Interpretation, Statistical ; Female ; General aspects ; Humans ; Infant, Newborn ; Infant, Premature ; Infant, Very Low Birth Weight ; Logistic Models ; Medical sciences ; Miscellaneous ; Multiple Birth Offspring - statistics &amp; numerical data ; Nitric Oxide - therapeutic use ; Odds Ratio ; Pediatrics ; Pregnancy ; Pregnancy, Multiple - statistics &amp; numerical data ; Public health. Hygiene ; Public health. 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Study design A systematic review of recent perinatal trials assessed the prevalence of studies accounting for clustering of multiples. The Nitric Oxide to Prevent Chronic Lung Disease (NO CLD) trial served as a case study of the sensitivity of the outcome to several statistical strategies. We calculated odds ratios using nonclustered (logistic regression) and clustered (generalized estimating equations, multiple outputation) analyses. Results In the systematic review, most studies did not describe the random assignment of twins and did not account for clustering. Of those studies that did, exclusion of multiples and generalized estimating equations were the most common strategies. The NO CLD study included 84 infants with a sibling enrolled in the study. Multiples were more likely than singletons to be white and were born to older mothers ( P &lt; .01). Analyses that accounted for clustering were statistically significant; analyses assuming independence were not. Conclusions The statistical approach to multiples can influence the odds ratio and width of confidence intervals, thereby affecting the interpretation of a study outcome. 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Hygiene</topic><topic>Public health. 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Study design A systematic review of recent perinatal trials assessed the prevalence of studies accounting for clustering of multiples. The Nitric Oxide to Prevent Chronic Lung Disease (NO CLD) trial served as a case study of the sensitivity of the outcome to several statistical strategies. We calculated odds ratios using nonclustered (logistic regression) and clustered (generalized estimating equations, multiple outputation) analyses. Results In the systematic review, most studies did not describe the random assignment of twins and did not account for clustering. Of those studies that did, exclusion of multiples and generalized estimating equations were the most common strategies. The NO CLD study included 84 infants with a sibling enrolled in the study. Multiples were more likely than singletons to be white and were born to older mothers ( P &lt; .01). Analyses that accounted for clustering were statistically significant; analyses assuming independence were not. Conclusions The statistical approach to multiples can influence the odds ratio and width of confidence intervals, thereby affecting the interpretation of a study outcome. A minority of perinatal studies address this issue.</abstract><cop>Maryland Heights, MO</cop><pub>Mosby, Inc</pub><pmid>19969305</pmid><doi>10.1016/j.jpeds.2009.08.049</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Bias
Biological and medical sciences
Bronchodilator Agents - therapeutic use
Bronchopulmonary Dysplasia - prevention & control
Cluster Analysis
Confidence Intervals
Data Interpretation, Statistical
Female
General aspects
Humans
Infant, Newborn
Infant, Premature
Infant, Very Low Birth Weight
Logistic Models
Medical sciences
Miscellaneous
Multiple Birth Offspring - statistics & numerical data
Nitric Oxide - therapeutic use
Odds Ratio
Pediatrics
Pregnancy
Pregnancy, Multiple - statistics & numerical data
Public health. Hygiene
Public health. Hygiene-occupational medicine
Randomized Controlled Trials as Topic - statistics & numerical data
Research Design - statistics & numerical data
Sensitivity and Specificity
Survival Analysis
title Accounting for Multiple Births in Neonatal and Perinatal Trials: Systematic Review and Case Study
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