ABNORMAL INSULIN-TREATMENT BEHAVIOR - A MAJOR CAUSE OF KETOACIDOSIS IN THE YOUNG-ADULT

Diabetic ketoacidosis occurs more frequently in the young adult popula tion than in any other age group. In a 3-year retrospective casenote r eview of all patients admitted with ketoacidosis to this hospital, we have defined the clinical characteristics of ketoacidosis in this age group. Young adults (< 25 years) had worse preceding glycaemic control (median HbA(1) 14.6 vs 10.1 %, p = 0.0001) and more frequent episodes of ketoacidosis in the previous 5 years (3 vs 0, p = 0.0001) than old er adults (> 25 years); on admission they had lower blood urea concent rations (p = 0.0001) and had a lower incidence of systolic hypotension (6 % vs 32 %, p = 0.007). There were fewer complications of ketoacido sis in the young adults, and the duration of hospital stay was less th an that in the older age group (4 vs 8 days, p = 0.0003). Young adults were less likely to have a proven underlying infective or other organ ic precipitant for ketoacidosis, but were investigated and treated in a similar way to older adults. Insulin error or manipulation was ident ified in 42 % of young adults; abnormal insulin treatment behaviour is likely to be the major cause of ketoacidosis in this age group.