Final adult height and its relationship to blood glucose control and microvascular complications in IDDM.

The effect of longitudinal blood glucose control on final adult height was evaluated in 181 subjects (94 women and 87 men) with IDDM. Diabetes onset was at a median age of 6.9 years with an interquartile range of 4.7 years. Longitudinal glycated haemoglobin values were determined over a mean period of 6.6 +/- 2.6 years during their growth phase. Serial eye and joint examinations and urinary albumin excretion rates were performed with final assessment being carried out at a mean age of 21.1 +/- 3.0 years. The mean adult height standard deviation score of the whole group was -0.22 +/- 1.15 and was reduced compared to the mean height of the general population and to the mean height of the subjects' parents and siblings. There was an inverse correlation with mean longitudinal glycated haemoglobin and final adult height (p < 0.01). There was also an inverse relationship between adult height and the severity of eye, kidney, and joint complications, but when controlled by glycated haemoglobin, this relationship only remained significant for eye complications. Final adult height is reduced in subjects with early onset IDDM who remain in poor blood glucose control during their growth period.