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The incidence of cystic fibrosis related diabetes (CFRD) has risen significantly as patients' survival improves. Early diagnosis of CFRD is crucial to prevent the unnecessary deterioration of lung function and nutritional status, both of which affect the patient's overall survival. The oral glucose tolerance test (OGGT) is the accepted method for detecting CFRD. The Cystic Fibrosis Trust guidelines (2004) recommend that patients with CF over the age of twelve years should be screened annually. Most hospitals use an annual OGTT. Performing OGTT on all CF patients is inconvenient and may not be cost effective, as patients have to starve overnight and need to spend an extra 2 hours in the hospital in addition to all the other annual review tests. In our centre, a selective approach is used. If patients have an abnormal random blood glucose and /or abnormal glycosylated haemoglobin (HbA1c) and/or symptoms of hyperglycaemia or unexplained weight loss then an OGTT will be performed.
The aims of this study are
1. To compare the clinical efficiency in the screening for CFRD in the two different methods: i)a selective approach , ii)an unselected annual OGTT for all patients.
2. To compare the cost effectiveness of the two approaches in the screening for CFRD.
CFRD affects 30% of all patients with cystic fibrosis (CF) by the age of twenty−five. Early diagnosis of CFRD is crucial to prevent the unnecessary deterioration of pulmonary function and nutritional status, both of which affect the patient's overall survival. The selective approach takes less patient time and is less expensive. If it is equally accurate it should be used routinely. The oral glucose tolerance test (OGTT) is the accepted method for detecting CFRD and the Cystic Fibrosis Trust guidelines recommend that patients with CF over the age of twelve years should be screened annually. Yung et al, questioned this approach and argued that performing OGTT on all CF patients is inconvenient and may not be cost effective, as patients have to starve overnight and need to spend an extra 2 hours in the hospital in addition to all the other annual review tests.
In this study, a selective approach in performing OGTTs in the screening for CFRD will be used; this includes the use of a combination of clinical and biochemical criteria that of abnormal random blood glucose and /or abnormal glycosylated haemoglobin (HbA1c) and/or symptoms of hyperglycaemia, or weight loss.
Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Investigator), Primary Purpose: Screening
Screening of Cystic Fibrosis Related Diabetes.
Glucose profile for 2 weeks
Royal Brompton & Harefield Foundation Trust
Imperial College London
Published on BioPortfolio: 2014-08-27T03:15:04-0400
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An autosomal recessive genetic disease of the EXOCRINE GLANDS. It is caused by mutations in the gene encoding the CYSTIC FIBROSIS TRANSMEMBRANE CONDUCTANCE REGULATOR expressed in several organs including the LUNG, the PANCREAS, the BILIARY SYSTEM, and the SWEAT GLANDS. Cystic fibrosis is characterized by epithelial secretory dysfunction associated with ductal obstruction resulting in AIRWAY OBSTRUCTION; chronic RESPIRATORY INFECTIONS; PANCREATIC INSUFFICIENCY; maldigestion; salt depletion; and HEAT PROSTRATION.
A chloride channel that regulates secretion in many exocrine tissues. Abnormalities in the CFTR gene have been shown to cause cystic fibrosis. (Hum Genet 1994;93(4):364-8)
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