Diabetes mellitus may often complicate the cystic fibrosis course, and it is usually preceded by a condition defined as glucose intolerance, during which a significant decay of patient's general conditions is observed. A slow release insulin (glargine) has become available in the market for diabetic patients: its characteristics allow for a single daily dose, and no need of repeated daily monitoring of glycemia.~In this randomized controlled clinical trial we evaluate whether the anticipated use of glargine in CF patients with glucose intolerance may prevent the worsening of nutritional status and pulmonary function.~Eligible patients who will accept to participate to this study will be randomly allocated in the group who will or will not receive glargine as additional supportive therapy. Patients will in any case continue the CF therapy prescribed by their treating physicians and their usual diet. All the patients will be evaluated every three months to assess their nutritional, pulmonary and glycometabolic status. The follow-up will continue until the 18th month after the study entry.
The purpose of this study is to evaluate whether the anticipated use of glargine in CF patients with glucose intolerance may prevent the worsening of nutritional status and pulmonary function.