OBJECTIVE The epidemiological association between coffee drinking and decreased risk of type 2 diabetes is strong. However, caffeinated coffee acutely impairs glucose metabolism. We assessed acute effects of decaffeinated coffee on glucose and insulin levels. RESEARCH DESIGN AND METHODS This was a randomized, cross-over, placebo-controlled trial of the effects of decaffeinated coffee, caffein...

OBJECTIVE To compare three strategies for gestational diabetes screening (i) screening of high-risk pregnant women with the 50 g oral glucose tolerance test (OGTT); (ii) screening of all pregnant women with the 50 g OGTT; (iii) screening of all pregnant women according to the 75 g OGTT. STUDY DESIGN Cost-effectiveness analysis. The outcome measures, i.e. macrosomia, prematurity, perinatal mor...

OBJECTIVE To assess random venous blood glucose (RBG) measurement at antenatal booking to detect "overt diabetes in pregnancy" (ODIP). RESEARCH DESIGN AND METHODS A retrospective analysis of regional hospital obstetric data from 2004-2008 was performed. Universal RBG screening was included at booking. Oral glucose tolerance test (OGTT) was administered if RBG >7.0 mmol/L or other indications,...

OBJECTIVE To compare screen-detected diabetes prevalence and the degree of diagnostic agreement by ethnicity with the current oral glucose tolerance test (OGTT)-based and newly proposed A1C-based diagnostic criteria. RESEARCH DESIGN AND METHODS Six studies (1999-2009) from Denmark, the U.K., Australia, Greenland, Kenya, and India were tested for the probability of an A1C > or =6.5% among diabet...

Glucose intolerance during pregnancy is defined as gestational diabetes mellitus (GDM). 95 women after 1 year birth were divided into GDM (n = 22), GIGT (gestational impaired glucose tolerance, n = 41) and NGT (normal, n = 32) groups. The GIGT group was subdivided into GIGT1 (abnormal blood glucose in 1 h, n = 11), GIGT2 (in 2 h, n = 18) and GIGT3 (in 3 h, n = 12) after oral glucose tolerance t...

Gestational diabetes mellitus (GDM) has important maternal and fetal implications. In 2010, the Health Service Executive published guidelines on GDM. We examined the impact of the new guidelines in a large maternity unit. In January 2011, the hospital replaced the 100 g Oral Glucose Tolerance Test (OGTT) with the new 75 g OGTT. We compared the first 6 months of 2011 with the first 6 months of 2...

To investigate the association between muscle fiber capillarization and indices of insulin sensitivity in healthy older adults. A skeletal muscle biopsy was taken from the m vastus lateralis of 22 healthy (nondiabetic) male older adults. In addition, all participants underwent an Oral Glucose Tolerance Test (OGTT). Muscle fiber capillarization was assessed by immunohistochemistry. Participants ...

OBJECTIVE To determine the rate of adherence to postpartum glycemic testing in women with gestational diabetes mellitus (GDM) and the performance of fasting plasma glucose (FPG) versus the 75-g oral glucose tolerance test (OGTT) in detecting postpartum glucose intolerance. RESEARCH DESIGN AND METHODS The study was a retrospective cohort of 1,006 women with GDM attending a pregnancy diabetes c...

OBJECTIVE To determine whether 1-h oral glucose challenge test (OGCT) or 3-h oral glucose tolerance test (OGTT) results below gestational diabetes mellitus (GDM) criteria are associated with developing diabetes. RESEARCH DESIGN AND METHODS A retrospective cohort study was performed among women without GDM who had a pregnancy OGCT (n = 24,780) or OGTT (n = 6,222). Subsequent diabetes was ascer...

While it is not possible to issue a guideline for the best method of screening, the use of a 75 g OGTT instead of an OGCT as first line of testing for women from high risk populations will avoid the inconvenience of further testing for both women and staff. Afternoon or evening clinics may be better advised to screen women using an OGCT (rather than an OGTT) because women are not required to fa...