A simple method for converting an odds ratio to effect size for use in meta-analysis

Chinn, Susan

doi:10.1002/1097-0258(20001130)19:22<3127::aid-sim784>3.0.co;2-m

Cited by 1,089 publications

(508 citation statements)

References 9 publications

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“…In cases where the results were presented as an odds ratio (OR), the OR was converted to the SMD using the method recommended by Chinn. 35 For those studies where the SMD estimation was not possible, due to study design or data presentation (two data points in total), the results were described independently.…”

Section: Data Extraction and Statistical Analysismentioning

confidence: 99%

Differential effect of intrauterine growth restriction on childhood neurodevelopment: a systematic review

Murray

Fernandes

Fazel

et al. 2015

BJOG

212

140

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Background Neurodevelopmental disorders are increasingly believed to originate from intrauterine growth restriction (IUGR). Current reviews exploring the neurodevelopmental effects of IUGR, however, are mostly based on birthweight, an inadequate proxy. Objective We aimed to examine the association between IUGR documented in utero, and neurodevelopmental outcomes during childhood. Search strategy Medline, CINAHL, PsycInfo and Scopus were searched for relevant studies published after 1970. Selection criteria The analysis included studies that identified IUGR in utero, with follow‐up assessments between 1 month and 12 years of age. Data collection and analysis Data was extracted for cognitive, behavioural, language, motor, hearing, vision or sleep outcomes. Studies were summarised separately for children born at <35 and ≥35 weeks gestation. Main results Of 28 876 titles identified, 38 were suitable for inclusion. IUGR children born ≥35 weeks gestation scored on average 0.5 SD lower than non‐IUGR children across all neurodevelopmental assessments. IUGR children born <35 weeks of gestation scored approximately 0.7 SD lower than non‐IUGR children across all neurodevelopmental assessments. IUGR children with evidence of fetal circulatory redistribution (preferential perfusion of the brain) had more severe neurodevelopmental impairments than those born IUGR alone. Conclusions IUGR increases the risk of neurodevelopmental impairment during childhood differentially across domains. IUGR children born preterm or with evidence of fetal circulatory redistribution are more severely affected. Tweetable abstract IUGR is associated with an overall risk for neurodevelopmental delay in a range of neurodevelopmental domains.

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Section: Data Extraction and Statistical Analysismentioning

confidence: 99%

Differential effect of intrauterine growth restriction on childhood neurodevelopment: a systematic review

Murray

Fernandes

Fazel

et al. 2015

BJOG

212

140

View full text Add to dashboard Cite

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“…Chinn's method for converting an OR to effect size was used to compute SMDs of continuous outcomes that had been artificially dichotomised in primary studies [11]. Studies comparing mentally comorbid patients and patients without mental disorders using β coefficients derived from regression analyses were not included in meta-analyses due to their methodological shortcomings when used as measures of effect [12].…”

Section: Quantitative Data Analysismentioning

confidence: 99%

Healthcare costs in patients with diabetes mellitus and comorbid mental disorders—a systematic review

2010

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Aims/hypothesis We systematically reviewed the impact of comorbid mental disorders on healthcare costs in persons with diabetes. Method We conducted a comprehensive search for studies investigating adult persons (≥18 years old) with diabetes mellitus. All studies that allowed comparison of healthcare costs between diabetic patients with mental disorders and those without were included. Results We identified 4,273 potentially relevant articles from a comprehensive database search. Of these, 31 primary studies (39 publications) fulfilled inclusion criteria, of which 27 examined comorbid depression. Hospitalisation rates and hospitalisation costs, frequency and costs of outpatient visits, emergency department visits, medication costs and total healthcare costs were mainly increased with small to moderate effect sizes in patients with diabetes and comorbid mental disorders compared with diabetic patients without such problems. Frequency (standardised mean difference [SMD]=0.35-1.26) and costs (SMD= 0.33-0.85) of mental health specialist visits were increased in the group with mental health comorbidity. Results regarding diabetes-related preventive services were inconsistent but point to a reduced utilisation rate in diabetic patients with comorbid mental disorders. Statistical heterogeneity between studies was high (I 2 range 64-98%).Pooled overall effects are therefore not reported. Studies included differ substantially regarding sample selection, assessment of diabetes and comorbid mental disorders, as well as in assessment of cost variables. Conclusions/interpretation In light of the increased healthcare costs and inadequate use of preventive services, comorbid mental disorders in patients with diabetes must become a major focus of diabetes healthcare and research.

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“…To assess the eff ect of MFQ imputation and missing covariate data on fi ndings, we did unweighted GLM with mental health service contact at T1 predicting T3 MFQ clinical cutoff (adjusted by T1 MFQ only) in three separate models: model A (raw MFQ [n=95]), model B (imputed MFQ [n=124]), and model C (imputed MFQ with missing data from propensity score weighted covariates [n=119]). Eff ect sizes (calculated from odds ratios 26 ) for mental health service contact in these models were similar (0·44 for model A, 0·46 for model B, and 0·45 for model C), indicating no eff ect of imputation or missing data.…”

Section: Resultsmentioning

confidence: 87%

Reduction in adolescent depression after contact with mental health services: a longitudinal cohort study in the UK

Neufeld

Jones

Goodyer

2017

The Lancet Psychiatry

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A simple method for converting an odds ratio to effect size for use in meta-analysis

Cited by 1,089 publications

References 9 publications

Differential effect of intrauterine growth restriction on childhood neurodevelopment: a systematic review

Differential effect of intrauterine growth restriction on childhood neurodevelopment: a systematic review

Healthcare costs in patients with diabetes mellitus and comorbid mental disorders—a systematic review

Reduction in adolescent depression after contact with mental health services: a longitudinal cohort study in the UK

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