Objective. There is no consensus on the possible association between diabetes and salivary dysfunction in older persons with diabetes. This study's purpose was to investigate the effect of diabetes and glycemic control on salivary function in an older population. Study design. Twenty nine persons with type 2 diabetes and 23 nondiabetic control subjects participated (age range, 54-90 years). Diabetic status was determined by a glycosylated hemoglobin (HbA 1c) test and a 2-hour glucose tolerance test. Poor glycemic control was defined as HbA 1c >9%. Unstimulated whole saliva, unstimulated parotid, and stimulated parotid flow rates were measured, and subjects completed a standardized xerostomia questionnaire. Results. Persons with poorly controlled diabetes had lower (P = .01) stimulated parotid flow rates than persons with well-controlled diabetes and nondiabetic control subjects. There were no significant differences in xerostomic complaints based on diabetic or glycemic control status or salivary flow rates. Conclusions. These results provide some evidence that poorly controlled diabetes may be associated with salivary dysfunction in older adults who have no concomitant complaints of xerostomia. Copyright © 2000 by Mosby, Inc.
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