The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation
Background: Gestational diabetes mellitus (GDM) is associated with a higher risk of important adverse outcomes. Practice varies and the best strategy for identifying and treating GDM is unclear. Aim: To estimate the clinical effectiveness and cost-effectiveness of strategies for identifying and trea...
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| Format: | Article |
| Language: | English |
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NIHR Journals Library
2016-11-01
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| Series: | Health Technology Assessment |
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| Online Access: | https://doi.org/10.3310/hta20860 |
| _version_ | 1828401143070326784 |
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| author | Diane Farrar Mark Simmonds Susan Griffin Ana Duarte Debbie A Lawlor Mark Sculpher Lesley Fairley Su Golder Derek Tuffnell Martin Bland Fidelma Dunne Donald Whitelaw John Wright Trevor A Sheldon |
| author_facet | Diane Farrar Mark Simmonds Susan Griffin Ana Duarte Debbie A Lawlor Mark Sculpher Lesley Fairley Su Golder Derek Tuffnell Martin Bland Fidelma Dunne Donald Whitelaw John Wright Trevor A Sheldon |
| author_sort | Diane Farrar |
| collection | DOAJ |
| description | Background: Gestational diabetes mellitus (GDM) is associated with a higher risk of important adverse outcomes. Practice varies and the best strategy for identifying and treating GDM is unclear. Aim: To estimate the clinical effectiveness and cost-effectiveness of strategies for identifying and treating women with GDM. Methods: We analysed individual participant data (IPD) from birth cohorts and conducted systematic reviews to estimate the association of maternal glucose levels with adverse perinatal outcomes; GDM prevalence; maternal characteristics/risk factors for GDM; and the effectiveness and costs of treatments. The cost-effectiveness of various strategies was estimated using a decision tree model, along with a value of information analysis to assess where future research might be worthwhile. Detailed systematic searches of MEDLINE® and MEDLINE In-Process & Other Non-Indexed Citations®, EMBASE, Cumulative Index to Nursing and Allied Health Literature Plus, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, Health Technology Assessment database, NHS Economic Evaluation Database, Maternity and Infant Care database and the Cochrane Methodology Register were undertaken from inception up to October 2014. Results: We identified 58 studies examining maternal glucose levels and outcome associations. Analyses using IPD alone and the systematic review demonstrated continuous linear associations of fasting and post-load glucose levels with adverse perinatal outcomes, with no clear threshold below which there is no increased risk. Using IPD, we estimated glucose thresholds to identify infants at high risk of being born large for gestational age or with high adiposity; for South Asian (SA) women these thresholds were fasting and post-load glucose levels of 5.2 mmol/l and 7.2 mmol/l, respectively and for white British (WB) women they were 5.4 and 7.5 mmol/l, respectively. Prevalence using IPD and published data varied from 1.2% to 24.2% (depending on criteria and population) and was consistently two to three times higher in SA women than in WB women. Lowering thresholds to identify GDM, particularly in women of SA origin, identifies more women at risk, but increases costs. Maternal characteristics did not accurately identify women with GDM; there was limited evidence that in some populations risk factors may be useful for identifying low-risk women. Dietary modification additional to routine care reduced the risk of most adverse perinatal outcomes. Metformin (Glucophage,® Teva UK Ltd, Eastbourne, UK) and insulin were more effective than glibenclamide (Aurobindo Pharma – Milpharm Ltd, South Ruislip, Middlesex, UK). For all strategies to identify and treat GDM, the costs exceeded the health benefits. A policy of no screening/testing or treatment offered the maximum expected net monetary benefit (NMB) of £1184 at a cost-effectiveness threshold of £20,000 per quality-adjusted life-year (QALY). The NMB for the three best-performing strategies in each category (screen only, then treat; screen, test, then treat; and test all, then treat) ranged between –£1197 and –£1210. Further research to reduce uncertainty around potential longer-term benefits for the mothers and offspring, find ways of improving the accuracy of identifying women with GDM, and reduce costs of identification and treatment would be worthwhile. Limitations: We did not have access to IPD from populations in the UK outside of England. Few observational studies reported longer-term associations, and treatment trials have generally reported only perinatal outcomes. Conclusions: Using the national standard cost-effectiveness threshold of £20,000 per QALY it is not cost-effective to routinely identify pregnant women for treatment of hyperglycaemia. Further research to provide evidence on longer-term outcomes, and more cost-effective ways to detect and treat GDM, would be valuable. Study registration: This study is registered as PROSPERO CRD42013004608. Funding: The National Institute for Health Research Health Technology Assessment programme. |
| first_indexed | 2024-12-10T09:42:06Z |
| format | Article |
| id | doaj.art-48e71635747248ec8d6b8862f6e7f42a |
| institution | Directory Open Access Journal |
| issn | 1366-5278 2046-4924 |
| language | English |
| last_indexed | 2024-12-10T09:42:06Z |
| publishDate | 2016-11-01 |
| publisher | NIHR Journals Library |
| record_format | Article |
| series | Health Technology Assessment |
| spelling | doaj.art-48e71635747248ec8d6b8862f6e7f42a2022-12-22T01:53:57ZengNIHR Journals LibraryHealth Technology Assessment1366-52782046-49242016-11-01208610.3310/hta2086011/99/02The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluationDiane Farrar0Mark Simmonds1Susan Griffin2Ana Duarte3Debbie A Lawlor4Mark Sculpher5Lesley Fairley6Su Golder7Derek Tuffnell8Martin Bland9Fidelma Dunne10Donald Whitelaw11John Wright12Trevor A Sheldon13Bradford Institute for Health Research, Bradford Teaching Hospitals, Bradford, UKCentre for Reviews and Dissemination, University of York, York, UKCentre for Health Economics, University of York, York, UKCentre for Health Economics, University of York, York, UKMRC Integrative Epidemiology Unit at the University of Bristol, Bristol, UKCentre for Health Economics, University of York, York, UKBradford Institute for Health Research, Bradford Teaching Hospitals, Bradford, UKDepartment of Health Sciences, University of York, York, UKBradford Women’s and Newborn Unit, Bradford Teaching Hospitals, Bradford, UKDepartment of Health Sciences, University of York, York, UKGalway Diabetes Research Centre (GDRC) and School of Medicine, National University of Ireland, Galway, Republic of IrelandDepartment of Diabetes & Endocrinology, Bradford Teaching Hospitals, Bradford, UKBradford Institute for Health Research, Bradford Teaching Hospitals, Bradford, UKHull York Medical School, University of York, York, UKBackground: Gestational diabetes mellitus (GDM) is associated with a higher risk of important adverse outcomes. Practice varies and the best strategy for identifying and treating GDM is unclear. Aim: To estimate the clinical effectiveness and cost-effectiveness of strategies for identifying and treating women with GDM. Methods: We analysed individual participant data (IPD) from birth cohorts and conducted systematic reviews to estimate the association of maternal glucose levels with adverse perinatal outcomes; GDM prevalence; maternal characteristics/risk factors for GDM; and the effectiveness and costs of treatments. The cost-effectiveness of various strategies was estimated using a decision tree model, along with a value of information analysis to assess where future research might be worthwhile. Detailed systematic searches of MEDLINE® and MEDLINE In-Process & Other Non-Indexed Citations®, EMBASE, Cumulative Index to Nursing and Allied Health Literature Plus, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, Health Technology Assessment database, NHS Economic Evaluation Database, Maternity and Infant Care database and the Cochrane Methodology Register were undertaken from inception up to October 2014. Results: We identified 58 studies examining maternal glucose levels and outcome associations. Analyses using IPD alone and the systematic review demonstrated continuous linear associations of fasting and post-load glucose levels with adverse perinatal outcomes, with no clear threshold below which there is no increased risk. Using IPD, we estimated glucose thresholds to identify infants at high risk of being born large for gestational age or with high adiposity; for South Asian (SA) women these thresholds were fasting and post-load glucose levels of 5.2 mmol/l and 7.2 mmol/l, respectively and for white British (WB) women they were 5.4 and 7.5 mmol/l, respectively. Prevalence using IPD and published data varied from 1.2% to 24.2% (depending on criteria and population) and was consistently two to three times higher in SA women than in WB women. Lowering thresholds to identify GDM, particularly in women of SA origin, identifies more women at risk, but increases costs. Maternal characteristics did not accurately identify women with GDM; there was limited evidence that in some populations risk factors may be useful for identifying low-risk women. Dietary modification additional to routine care reduced the risk of most adverse perinatal outcomes. Metformin (Glucophage,® Teva UK Ltd, Eastbourne, UK) and insulin were more effective than glibenclamide (Aurobindo Pharma – Milpharm Ltd, South Ruislip, Middlesex, UK). For all strategies to identify and treat GDM, the costs exceeded the health benefits. A policy of no screening/testing or treatment offered the maximum expected net monetary benefit (NMB) of £1184 at a cost-effectiveness threshold of £20,000 per quality-adjusted life-year (QALY). The NMB for the three best-performing strategies in each category (screen only, then treat; screen, test, then treat; and test all, then treat) ranged between –£1197 and –£1210. Further research to reduce uncertainty around potential longer-term benefits for the mothers and offspring, find ways of improving the accuracy of identifying women with GDM, and reduce costs of identification and treatment would be worthwhile. Limitations: We did not have access to IPD from populations in the UK outside of England. Few observational studies reported longer-term associations, and treatment trials have generally reported only perinatal outcomes. Conclusions: Using the national standard cost-effectiveness threshold of £20,000 per QALY it is not cost-effective to routinely identify pregnant women for treatment of hyperglycaemia. Further research to provide evidence on longer-term outcomes, and more cost-effective ways to detect and treat GDM, would be valuable. Study registration: This study is registered as PROSPERO CRD42013004608. Funding: The National Institute for Health Research Health Technology Assessment programme.https://doi.org/10.3310/hta20860hyperglycaemiapregnancysystematic reviewmeta-analysisgestational diabetesassociationsprevalencetreatmentsrisk factorscost-effectivenesseconomic analysisvalue of information analysis |
| spellingShingle | Diane Farrar Mark Simmonds Susan Griffin Ana Duarte Debbie A Lawlor Mark Sculpher Lesley Fairley Su Golder Derek Tuffnell Martin Bland Fidelma Dunne Donald Whitelaw John Wright Trevor A Sheldon The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation Health Technology Assessment hyperglycaemia pregnancy systematic review meta-analysis gestational diabetes associations prevalence treatments risk factors cost-effectiveness economic analysis value of information analysis |
| title | The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation |
| title_full | The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation |
| title_fullStr | The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation |
| title_full_unstemmed | The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation |
| title_short | The identification and treatment of women with hyperglycaemia in pregnancy: an analysis of individual participant data, systematic reviews, meta-analyses and an economic evaluation |
| title_sort | identification and treatment of women with hyperglycaemia in pregnancy an analysis of individual participant data systematic reviews meta analyses and an economic evaluation |
| topic | hyperglycaemia pregnancy systematic review meta-analysis gestational diabetes associations prevalence treatments risk factors cost-effectiveness economic analysis value of information analysis |
| url | https://doi.org/10.3310/hta20860 |
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