In a study of 972 patients with diabetes mellitus, humoral pancreatic islet-cell antibodies (I.C.Ab.) were detected in highest prevalence in insulin-treated diabetics with (38 per cent) and without (22 per cent) associated overt organ-specific autoimmune disease (A.I.D.) where consideration was not given to the duration of diabetes. They were also detected in 8 per cent of diabetics treated with oral hypoglycemic agents (O.H.A.), but not in diabetics requiring diet alone and in only 0.5 per cent of 434 control subjects. Six per cent of 522 patients with overt organ-specific A.I.D. but not diagnosed to be diabetic had I.C.Ab.s. I.C.Ab.s were present in the sera of 2 per cent of 157 first-degree relatives of I.C.Ab.-positive subjects. In insulin-treated diabetics and, to a lesser extent, in diabetics not requiring insulin, the prevalence of humoral I.C.Ab. was strongly dependent of the duration of the diabetes, being 60 per cent during the first year from diagnosis in the insulin-treated group and falling to 20 per cent at two to five years and to 5 per cent at 10-20 years. The prevalence of I.C.Ab. in insulin-treated diabetics showed no correlation with the patient's age at the time of testing when the duration of diabetes was taken into account. Diabetics who did not require insulin for treatment but who were I.C.Ab.-positive showed a significant tendency to subsequently require insulin and to have a higher prevalence of other autoantibodies than insulin-independent diabetics who were I.C.Ab.-negative. Persistence of I.C.Ab. for more than five years from diagnosis of diabetes was associated with coexistent overt organ-specific A.I.D. and with HLA-B8, A1, and A1 + B8.
Forty-eight families with children less than 13 years old attending a paediatric diabetic clinic volunteered for a 2-year randomized crossover trial to determine whether an informal education programme (diabetic club) could improve diabetic control. Group A attended the diabetic club for 10 afternoons of informal education in the first year, while Group B continued at the routine clinic (5 visits per year). For the second year Group A returned to the clinic, Group B attended the club. Glycosylated haemoglobin (HbA1) remained stable while attending the club but rose significantly (p less than 0.01) while attending the clinic in both groups (HbA1 at baseline, 1 year, and 2 years: Group A, 9.6 (SD 1.2), 9.6(1.4), 10.7(2.1)%; Group B 8.9(1.3), 10.4(1.4), 10.5(1.4)% (normal reference range 4.7-7.9%)). Other indices of control were unchanged. Diabetic problem-solving scores of parents improved (p less than 0.01) but their knowledge of diabetes did not correlate with their child's HbA1. Dietary intake showed a reduction in percentage of energy taken as fat (40% vs 37.7%, p less than 0.05) during club attendance. The percentage of parents reporting helpful social contact between families increased during their club year (Group A 50 to 78%, Group B 32 to 57%, p less than 0.001). Psychological measurements remained unchanged. An education programme for diabetic children may stabilize diabetic control in the short term but this effect is not sustained. The main benefit was the support provided by increased social contact with families of other diabetic children within the informal framework of the diabetic club.
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