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Severe hypoglycemia in IDDM children
I Bergada1, S Suissa, J Dufresne
1Diabetes Unit, Montreal Children's Hospital, McGill University Research Institute, Quebec, Canada.
Insights
Severe hypoglycemia in children with insulin-dependent diabetes mellitus (IDDM) is often recurrent. Higher insulin doses and prior episodes predict future risk, not age or glucose control.
Area of Science:
- Pediatric Endocrinology
- Metabolic Disorders
- Diabetes Management
Background:
- Severe hypoglycemia is a significant complication in pediatric patients with insulin-dependent diabetes mellitus (IDDM).
- Understanding risk factors is crucial for preventing adverse events in this population.
Purpose of the Study:
- To determine the incidence of severe hypoglycemia in a cohort of children with IDDM.
- To identify predictors of severe hypoglycemia in this group.
Main Methods:
- A 1-year prospective study involving 350 children with IDDM.
- Comparison of demographic, clinical, and treatment variables between patients with and without severe hypoglycemia.
- Logistic regression analysis to identify risk factors.
Main Results:
- The incidence of severe hypoglycemia was 6.8% (25 episodes in 24 patients).
- Higher insulin doses (P=.04) and a history of previous severe hypoglycemia (P=.01) were significantly associated with recurrent episodes.
- Age, glycosylated hemoglobin, and duration of disease were not significant predictors.
- Unusual circumstances preceded only 64% of episodes.
Conclusions:
- Severe hypoglycemia is a recurrent issue in some children with IDDM, independent of age or glycemic control.
- Previous episodes of severe hypoglycemia and higher insulin doses are key risk factors.
- Strategies like regular monitoring, consistent meal timing, and adjusted food intake for activity may mitigate risk.
Abstract:
The incidence of severe hypoglycemia was determined in a 1-yr prospective study of 350 insulin-dependent diabetic (IDDM) children. There were no significant differences in mean glycosylated hemoglobin, age, and duration of disease between the patients who had severe hypoglycemia and those who did not. There were 25 episodes in 24 patients (6.8%). Their insulin doses at the time of the episode (U.kg-1.day-1) were significantly higher than those of the nonhypoglycemic group (mean +/- SD 1.01 +/- 0.30 vs. 0.89 +/- 0.29; P = .04). The hypoglycemic group had a significantly higher mean number of previous episodes of severe hypoglycemia than the nonhypoglycemic group (0.92 +/- 1.18 vs. 0.25 +/- 0.68; P = .01). In only 64% of the episodes, an unusual circumstance such as strenuous physical activity or missed or delayed meals preceded the event. Multivariate analysis of the data by logistic regression showed risks of developing hypoglycemia of 2.5 per 0.5 U/day insulin and of 2.0 per previous episode of severe hypoglycemia. We conclude that severe hypoglycemia may be a recurrent problem in some diabetic children, but it does not appear to be related to age or blood glucose control. The presence of previous episodes may be a guide to identify patients at greater risk of developing severe hypoglycemia. Adherence to regular testing, strict spacing and consistency of meals, and extra food for extra activity may reduce this serious complication.