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"McCance, David R"
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Vitamins C and E for prevention of pre-eclampsia in women with type 1 diabetes (DAPIT): a randomised placebo-controlled trial
by
Young, Ian S
,
Patterson, Christopher C
,
Holmes, Valerie A
in
Adult
,
Antioxidants
,
Antioxidants - therapeutic use
2010
Results of several trials of antioxidant use during pregnancy have not shown a reduction in pre-eclampsia, but the effect in women with diabetes is unknown. We aimed to assess whether supplementation with vitamins C and E reduced incidence of pre-eclampsia in women with type 1 diabetes.
We enrolled women from 25 UK antenatal metabolic clinics in a multicentre randomised placebo-controlled trial. Eligibility criteria were type 1 diabetes preceding pregnancy, presentation between 8 weeks' and 22 weeks' gestation, singleton pregnancy, and age 16 years or older. Women were randomly allocated in a 1:1 ratio to receive 1000 mg vitamin C and 400 IU vitamin E (α-tocopherol) or matched placebo daily until delivery. The randomisation sequence was stratified by centre with balanced blocks of eight patients. All trial personnel and participants were masked to treatment allocation. The primary endpoint was pre-eclampsia, which we defined as gestational hypertension with proteinuria. Analysis was by modified intention to treat. This study is registered, ISRCTN27214045.
Between April, 2003, and June, 2008, 762 women were randomly allocated to treatment groups (379 vitamin supplementation, 383 placebo). The primary endpoint was assessed for 375 women allocated to receive vitamins, and 374 allocated to placebo. Rates of pre-eclampsia did not differ between vitamin (15%, n=57) and placebo (19%, 70) groups (risk ratio 0·81, 95% CI 0·59–1·12). No adverse maternal or neonatal outcomes were reported.
Supplementation with vitamins C and E did not reduce risk of pre-eclampsia in women with type 1 diabetes. However, the possibility that vitamin supplementation might be beneficial in women with a low antioxidant status at baseline needs further testing.
The Wellcome Trust.
Journal Article
Automated Insulin Delivery in Women with Pregnancy Complicated by Type 1 Diabetes
by
Hovorka, Roman
,
Flanagan, Emma
,
Hammond, Matthew
in
Adult
,
Automation
,
Blood Glucose - analysis
2023
This trial randomly assigned pregnant women with type 1 diabetes to standard insulin therapy with continuous glucose monitoring or to hybrid closed-loop therapy. The latter significantly improved maternal glycemic control.
Journal Article
Mortality in type 1 diabetes diagnosed in childhood in Northern Ireland during 1989‐2012: A population‐based cohort study
by
Patterson, Christopher C
,
Abid, Noina
,
Cardwell, Christopher R
in
Childhood
,
Children
,
Cohort analysis
2018
Objective To investigate long‐term mortality rates and causes of death in individuals diagnosed with type 1 diabetes before the age of 15 years during the period 1989‐2012 or known to paediatric diabetes teams in 1989, in Northern Ireland. Methods A cohort of 3129 patients from the Northern Ireland Childhood Diabetes Register was linked to death registrations and underlying causes, coded according to ICD‐9 or ICD‐10. Standardized mortality ratios (SMRs) were calculated as the ratio of observed to expected deaths by sex, attained age, time since diagnosis, calendar period, and cause of death. Results Subjects were followed to December 31, 2012 giving 39 764 person‐years of follow‐up (median 12.1 years). In total, 59 subjects had died (1.5 per 1000 person‐years) compared with 19.9 deaths expected, an SMR of 296 (95% confidence interval (CI) 229‐382). Women had a significantly higher excess risk of mortality than men with SMRs of 535 (95% CI 361‐764) and 203 (95% CI 136‐291), respectively. Over half of the deaths (56%) were judged to be related or possibly related to diabetes with most of these due to acute (n = 24) or late (n = 6) complications. Conclusions Subjects with type 1 diabetes diagnosed less than 15 years of age had 3 times the mortality risk of the general population. Over half of the deaths were related to acute or chronic complications of diabetes.
Journal Article
The Hyperglycemia and Adverse Pregnancy Outcome Study: Associations of GDM and obesity with pregnancy outcomes
by
COUSTAN, Donald R
,
CATALANO, Patrick M
,
HOD, Moshe
in
Adult
,
analysis
,
Biological and medical sciences
2012
To determine associations of gestational diabetes mellitus (GDM) and obesity with adverse pregnancy outcomes in the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study.
Participants underwent a 75-g oral glucose tolerance test (OGTT) between 24 and 32 weeks. GDM was diagnosed post hoc using International Association of Diabetes and Pregnancy Study Groups criteria. Neonatal anthropometrics and cord serum C-peptide were measured. Adverse pregnancy outcomes included birth weight, newborn percent body fat, and cord C-peptide >90th percentiles, primary cesarean delivery, preeclampsia, and shoulder dystocia/birth injury. BMI was determined at the OGTT. Multiple logistic regression was used to examine associations of GDM and obesity with outcomes.
Mean maternal BMI was 27.7, 13.7% were obese (BMI ≥33.0 kg/m(2)), and GDM was diagnosed in 16.1%. Relative to non-GDM and nonobese women, odds ratio for birth weight >90th percentile for GDM alone was 2.19 (1.93-2.47), for obesity alone 1.73 (1.50-2.00), and for both GDM and obesity 3.62 (3.04-4.32). Results for primary cesarean delivery and preeclampsia and for cord C-peptide and newborn percent body fat >90th percentiles were similar. Odds for birth weight >90th percentile were progressively greater with both higher OGTT glucose and higher maternal BMI. There was a 339-g difference in birth weight for babies of obese GDM women, compared with babies of normal/underweight women (64.2% of all women) with normal glucose based on a composite OGTT measure of fasting plasma glucose and 1- and 2-h plasma glucose values (61.8% of all women).
Both maternal GDM and obesity are independently associated with adverse pregnancy outcomes. Their combination has a greater impact than either one alone.
Journal Article
Implementation of guidelines for multidisciplinary team management of pregnancy in women with pre-existing diabetes or cardiac conditions: results from a UK national survey
by
Taylor, Cath
,
McCance, David R.
,
Ismail, Khaled M. K.
in
Adult
,
Breast cancer
,
Cardiac conditions
2017
Background
Despite numerous publications stating the importance of multidisciplinary care for women with pre-existing medical conditions, there is a lack of evidence regarding structure or processes of multidisciplinary working, nor impact on maternal or infant outcomes. This study aimed to evaluate the implementation of guidelines for multidisciplinary team (MDT) management in pregnant women with pre-existing diabetes or cardiac conditions. These conditions were selected as exemplars of increasingly common medical conditions in pregnancy for which MDT management is recommended to prevent or reduce adverse maternal and fetal outcomes.
Methods
National on-line survey sent to clinicians responsible for management or referral of women with pre-existing diabetes or cardiac conditions in UK National Health Service (NHS) maternity units. The survey comprised questions regarding the organisation of MDT management for women with pre-existing diabetes or cardiac conditions. Content was informed by national guidance.
Results
One hundred seventy-nine responses were received, covering all health regions in England (162 responses) and 17 responses from Scotland, Wales and Northern Ireland. 132 (74%) related to women with diabetes and 123 (69%) to women with cardiac conditions. MDT referral was reportedly standard practice in most hospitals, particularly for women with pre-existing diabetes (88% of responses vs. 63% for cardiac) but there was wide variation in relation to MDT membership, timing of referral and working practices. These inconsistencies were evident within and between maternity units across the UK. Reported membership was medically dominated and often in the absence of midwifery/nursing and other allied health professionals. Less than half of MDTs for women with diabetes met the recommendations for membership in national guidance, and although two thirds of MDTs for women with cardiac disease met the core recommendations for membership, most did not report having the extended members: midwives, neonatologists or intensivists.
Conclusions
The wide diversity of organisational management for women with pre-existing diabetes or cardiac conditions is of concern and merits more detailed inquiry. Evidence is also required to support and better define the recommendations for MDT care.
Journal Article
A Practical Manual of Diabetes in Pregnancy
by
David McCance, Michael Maresh, David A. Sacks, David McCance, Michael Maresh, David A. Sacks
in
Diabetes in pregnancy
,
MEDICAL
2017
A PRACTICAL MANUAL OF DIABETES IN PREGNANCY
The second edition of A Practical Manual of Diabetes in Pregnancy offers a wealth of new evidence, new material, new technologies, and the most current approaches to care. With contributions from a team of international experts, the manual is highly accessible and comprehensive in scope. It covers topics ranging from preconception to postnatal care, details the risks associated with diabetic pregnancy, and the long-term implications for the mother and baby. The text also explores recent controversies and examines thorny political pressures.
The manual's treatment recommendations are based on the latest research to ensure pregnant women with diabetes receive the best possible care. The text takes a multi-disciplinary approach that reflects best practice in the treatment of diabetes in pregnancy. The revised second edition includes:
* New chapters on the very latest topics of interest
* Contributions from an international team of noted experts
* Practical, state-of-the-art text that has been fully revised with the latest in clinical guidance
* Easy-to-read, accessible format in two-color text design
* Illustrative case histories, practice points, and summary boxes, future directions, as well as pitfalls and what to avoid boxes
* Multiple choice questions with answers in each chapter
Comprehensive and practical, the text is ideal for use in clinical settings for reference by all members of the multi-disciplinary team who care for pregnant women with diabetes. The manual is also designed for learning and review purposes by trainees in endocrinology, diabetes, and obstetrics.
Maternal Vitamin D Status in Type 1 Diabetic Pregnancy: Impact on Neonatal Vitamin D Status and Association with Maternal Glycaemic Control
2013
The first aim of this study was to assess 25-hydroxy vitamin D (25OHD) concentrations in women with type 1 diabetes (T1DM) during pregnancy, post-delivery and also foetal (cord blood) 25OHD concentrations and to examine relationships between these. The second aim of the study was to investigate potential interactions between maternal body mass index (BMI) and foetal vitamin D status. A further study aim was to examine potential relationships between maternal 25OHD and glycosylated haemoglobin (HbA1c) throughout pregnancy.
This was an observational study of 52 pregnant controls without diabetes and 65 pregnant women with T1DM in a university teaching hospital. Maternal serum 25OHD was measured serially throughout the pregnancy and post-delivery. Cord blood 25OHD was measured at delivery. 25OHD was measured by liquid chromatography tandem mass spectrometry (LC-MS/MS).
Vitamin D deficiency (25OHD <25 nmol/L) was apparent in both the T1DM subjects and controls at all 3 pregnancy trimesters. Vitamin D levels in all cord blood were <50 nmol/L. Maternal 25OHD correlated positively with cord 25OHD at all 3 trimesters in the T1DM group (p=0.02; p<0.001; p<0.001). 25OHD levels within cord blood were significantly lower for women with diabetes classified as obese vs. normal weight at booking [normal weight BMI <25 kg/m(2) vs. obese BMI >30 kg/m(2) (nmol/L ± SD); 19.93 ± 11.15 vs. 13.73 ± 4.74, p=0.026]. In the T1DM group, HbA1c at booking was significantly negatively correlated with maternal 25OHD at all 3 trimesters (p=0.004; p=0.001; p=0.05).
In T1DM pregnancy, low vitamin D levels persist throughout gestation and post-delivery. Cord blood vitamin D levels correlate with those of the mother, and are significantly lower in obese women than in their normal weight counterparts. Maternal vitamin D levels exhibit a significant negative relationship with HbA1c levels, supporting a potential role for this vitamin in maintaining glycaemic control.
Journal Article
A peer support dietary change intervention for encouraging adoption and maintenance of the Mediterranean diet in a non-Mediterranean population (TEAM-MED): lessons learned and suggested improvements
by
Lloydwin, Christina
,
Salamanca-Gonzalez, Patricia
,
Woodside, Jayne V.
in
Behaviour, Appetite and Obesity
,
Data collection
,
Diet
2023
Peer support interventions for dietary change may offer cost-effective alternatives to interventions led by health professionals. This process evaluation of a trial to encourage the adoption and maintenance of a Mediterranean diet in a Northern European population at high CVD risk (TEAM-MED) aimed to investigate the feasibility of implementing a group-based peer support intervention for dietary change, positive elements of the intervention and aspects that could be improved. Data on training and support for the peer supporters; intervention fidelity and acceptability; acceptability of data collection processes for the trial and reasons for withdrawal from the trial were considered. Data were collected from observations, questionnaires and interviews, with both peer supporters and trial participants. Peer supporters were recruited and trained to result in successful implementation of the intervention; all intended sessions were run, with the majority of elements included. Peer supporters were complimentary of the training, and positive comments from participants centred around the peer supporters, the intervention materials and the supportive nature of the group sessions. Attendance at the group sessions, however, waned over the intervention, with suggested effects on intervention engagement, enthusiasm and group cohesion. Reduced attendance was reportedly a result of meeting (in)frequency and organisational concerns, but increased social activities and group-based activities may also increase engagement, group cohesion and attendance. The peer support intervention was successfully implemented and tested, but improvements can be suggested and may enhance the successful nature of these types of interventions. Some consideration of personal preferences may also improve outcomes.
Journal Article
Diabetic Retinopathy Screening Programme: Attendance, Barriers and Enablers amongst Young People with Diabetes Mellitus Aged 12–26 Years
2021
The study aim is to investigate characteristics, barriers and enablers for attendance at the Diabetic Eye Screening Programme Northern Ireland (DESPNI) among people with diabetes aged 12–26 years. A mixed-methods approach with retrospective analysis and prospective, questionnaire-based data collection was completed. Data were analysed using ordinal logistic regression. A questionnaire collected information on barriers and enablers to attending DESPNI. Age, diabetes duration, attendance at diabetes clinic and lower HbA1c values were significantly associated with better attendance. Those aged 12–15 were more likely to attend screening than 16–26 years, odds ratio (OR) 4.01. Subjects diagnosed less than 5 years were more likely to attend than those with longer diabetes duration (OR = 2.52, p =< 0.001). Subjects who attended diabetes clinics were more likely to attend screening (OR = 1.89, p =< 0.001) and have a lower HbA1c (OR = 1.46, p =< 0.001). Questionnaires revealed major barriers to attendance which included inconvenient appointment times, lack of access and poor communication. While many subjects were aware of the impact of diabetes on the eye, many had little understanding of screening. This study provides pivotal information on potential barriers and enablers for young people attending eye screening. We suggest modest changes such as convenient appointment times, clearer communication and one-stop clinics could improve attendance.
Journal Article
Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study: Associations of maternal A1C and glucose with pregnancy outcomes
by
Lowe, Lynn P
,
Dyer, Alan R
,
Hadden, David R
in
Adult
,
Analysis
,
Biological and medical sciences
2012
OBJECTIVE: To compare associations of maternal glucose and A1C with adverse outcomes in the multinational Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study and determine, based on those comparisons, if A1C measurement can provide an alternative to an oral glucose tolerance test (OGTT) in pregnant women. RESEARCH DESIGN AND METHODS: Eligible pregnant women underwent a 75-g OGTT at 24–32 weeks’ gestation. A sample for A1C was also collected. Neonatal anthropometrics and cord serum C-peptide were measured. Associations with outcomes were assessed using multiple logistic regression with adjustment for potential confounders. RESULTS: Among 23,316 HAPO Study participants with glucose levels blinded to caregivers, 21,064 had a nonvariant A1C result. The mean ± SD A1C was 4.79 ± 0.40%. Associations were significantly stronger with glucose measures than with A1C for birth weight, sum of skinfolds, and percent body fat >90th percentile and for fasting and 1-h glucose for cord C-peptide (all P < 0.01). For example, in fully adjusted models, odds ratios (ORs) for birth weight >90th percentile for each measure higher by 1 SD were 1.39, 1.45, and 1.38, respectively, for fasting, 1-, and 2-h plasma glucose and 1.15 for A1C. ORs for cord C-peptide >90th percentile were 1.56, 1.45, and 1.35 for glucose, respectively, and 1.32 for A1C. ORs were similar for glucose and A1C for primary cesarean section, preeclampsia, and preterm delivery. CONCLUSIONS: On the basis of associations with adverse outcomes, these findings suggest that A1C measurement is not a useful alternative to an OGTT in pregnant women.
Journal Article