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Preterm birth and childhood wheezing disorders: a systematic review and meta-analysis.

ABSTRACT: BACKGROUND: Accumulating evidence implicates early life factors in the aetiology of non-communicable diseases, including asthma/wheezing disorders. We undertook a systematic review investigating risks of asthma/wheezing disorders in children born preterm, including the increasing numbers who, as a result of advances in neonatal care, now survive very preterm birth. METHODS AND FINDINGS: Two reviewers independently searched seven online databases for contemporaneous (1 January 1995-23 September 2013) epidemiological studies investigating the association between preterm birth and asthma/wheezing disorders. Additional studies were identified through reference and citation searches, and contacting international experts. Quality appraisal was undertaken using the Effective Public Health Practice Project instrument. We pooled unadjusted and adjusted effect estimates using random-effects meta-analysis, investigated "dose-response" associations, and undertook subgroup, sensitivity, and meta-regression analyses to assess the robustness of associations. We identified 42 eligible studies from six continents. Twelve were excluded for population overlap, leaving 30 unique studies involving 1,543,639 children. Preterm birth was associated with an increased risk of wheezing disorders in unadjusted (13.7% versus 8.3%; odds ratio [OR] 1.71, 95% CI 1.57-1.87; 26 studies including 1,500,916 children) and adjusted analyses (OR 1.46, 95% CI 1.29-1.65; 17 studies including 874,710 children). The risk was particularly high among children born very preterm (<32 wk gestation; unadjusted: OR 3.00, 95% CI 2.61-3.44; adjusted: OR 2.81, 95% CI 2.55-3.12). Findings were most pronounced for studies with low risk of bias and were consistent across sensitivity analyses. The estimated population-attributable risk of preterm birth for childhood wheezing disorders was ?3.1%. Key limitations related to the paucity of data from low- and middle-income countries, and risk of residual confounding. CONCLUSIONS: There is compelling evidence that preterm birth-particularly very preterm birth-increases the risk of asthma. Given the projected global increases in children surviving preterm births, research now needs to focus on understanding underlying mechanisms, and then to translate these insights into the development of preventive interventions. REVIEW REGISTRATION: PROSPERO CRD42013004965.

SUBMITTER: Been JV

PROVIDER: S-EPMC3904844 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature

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Preterm birth and childhood wheezing disorders: a systematic review and meta-analysis.

Been Jasper V JV Lugtenberg Marlies J MJ Smets Eline E van Schayck Constant P CP Kramer Boris W BW Mommers Monique M Sheikh Aziz A

PLoS medicine 20140128 1

<h4>Background</h4>Accumulating evidence implicates early life factors in the aetiology of non-communicable diseases, including asthma/wheezing disorders. We undertook a systematic review investigating risks of asthma/wheezing disorders in children born preterm, including the increasing numbers who, as a result of advances in neonatal care, now survive very preterm birth.<h4>Methods and findings</h4>Two reviewers independently searched seven online databases for contemporaneous (1 January 1995-2 ...[more]

PMID: 24492409

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Project description:BackgroundGlobally, complications of preterm birth are among the most common cause of neonatal mortality. In Ethiopia, the neonatal mortality reduction is not worthy of attention. Hence, this study reviewed the prevalence of preterm birth and factors associated with preterm birth in Ethiopia.MethodsThe review protocol of this study has been registered in PROSPERO (CRD42017077356). The PRISMA guideline was followed for this review. Studies that assessed the prevalence and/or associated factors of preterm birth in Ethiopia and published from Jan 01, 2009 to Dec 31, 2019 were considered. Studies were searched from the PubMed and Science Direct among medical electronic databases and Google Scholar. Random-effects model was used for detected heterogeneity among studies. Publication bias and sensitivity analysis were assessed. Pooled estimates with its 95% confidence interval were reported using forest plots. The quality of evidence from the review was assessed using GRADE approach.ResultsTwenty-two studies involving a total of 12,279 participants were included. The overall pooled prevalence of preterm birth in Ethiopia was 10.48% (95% CI: 7.98-12.99). Pooled odds ratio showed rural residence (AOR = 2.34, 95% CI: 1.35-4.05), being anemic (AOR = 2.59, 95% CI: 1.85-3.64), < 4 antenatal care visits (AOR = 2.34, 95%CI: 1.73-3.33), pregnancy induced hypertension (AOR = 3.49, 95% CI: 2.45-4.97), prelabor rapture of membrane (AOR = 4.42, 95% CI: 2.28-8.57), antepartum hemorrhage (AOR = 5.02, 95% CI: 2.90-8.68), multiple pregnancies (AOR = 3.89, 95% CI: 2.52-5.99), past adverse birth outcomes (AOR = 3.24, 95% CI: 2.53-4.15) and chronic illness (AOR = 4.89, 95%CI: 3.12-7.66) were associated with increased likelihood of preterm birth. Further, support during pregnancy was associated with reduced occurrence of preterm birth.ConclusionThe pooled national level prevalence of preterm birth in Ethiopia is high. Socio demographic, nutritional, health care, obstetric and gynecologic, chronic illness and medical conditions, behavioral and lifestyle factors are the major associated factors of preterm birth in Ethiopia. This evidence is graded as low grade. Thus, efforts should be intensified to address reported risk factors to relieve the burden of preterm birth in the study setting, Ethiopia.

Project description:OBJECTIVE This study aimed to compare the uterocervical angles in term and spontaneous preterm birth cohorts and to compare the test characteristics of the uterocervical angle and cervical length in the prediction of spontaneous preterm birth. DATA SOURCES A systematic search of published literature from January 1, 1945, to May 15, 2022, was performed using the following databases: PubMed, Cochrane Central Register of Controlled Trials, Embase, World Health Organization International Clinical Trials Registry Platform, Web of Science, and ClinicalTrials.gov. The search was not restricted. The references of all relevant articles were reviewed. STUDY ELIGIBILITY CRITERIA Randomized control trials, nonrandomized control trials, and observational studies were evaluated for primary comparisons. Included studies compared the uterocervical angles in term and spontaneous preterm birth cohorts and compared the uterocervical angle with cervical length in the prediction of spontaneous preterm birth. METHODS Of note, 2 researchers independently selected studies and evaluated the risk of bias with the Newcastle-Ottawa Scale for cohort and case-control studies. Mean differences and odds ratios were calculated using a random effects model for inclusion and methodological quality. The primary outcomes were uterocervical angle and successful prediction of spontaneous preterm birth. Moreover, posthoc analysis comparing the uterocervical angle and cervical length together was performed. RESULTS A total of 15 cohort studies with 6218 patients were included. The uterocervical angle was larger in the spontaneous preterm birth cohorts (mean difference, 13.76; 95% confidence interval, 10.61–16.91; P<.00001; I2=90%). Sensitivity and specificity analyses demonstrated lower sensitivities with cervical length alone and uterocervical angle plus cervical length than with uterocervical angle alone. Pooled sensitivities for uterocervical angle and cervical length alone were 0.70 (95% confidence interval, 0.66–0.73; I2=90%) and 0.46 (95% confidence interval, 0.42–0.49; I2=96%), respectively. Pooled specificities for uterocervical angle and cervical length were 0.67 (95% confidence interval, 0.66–0.68; I2=97%) and 0.90 (95% confidence interval, 0.89–0.91; I2=99%), respectively. The areas under the curve for uterocervical angle and cervical length were 0.77 and 0.82, respectively. CONCLUSION Uterocervical angle alone or with cervical length was not superior to cervical length alone in predicting spontaneous preterm birth.

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Preterm birth and childhood wheezing disorders: a systematic review and meta-analysis.

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Preterm birth and childhood wheezing disorders: a systematic review and meta-analysis.

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