Abstract | OBJECTIVE: To use the Continuous Glucose Monitoring System (CGMS, MiniMed, Sylmar, Calif) to determine if bedtime blood glucose levels were associated with the occurrence of nocturnal hypoglycemia. STUDY DESIGN: Patients (n = 47, 18 boys, mean age 11.8 +/- 4.6 years) with type 1 diabetes used CGMS for 167 nights. Data were analyzed for glucose </=40 or </=50 mg/dL, comparing bedtime blood glucose levels of </=100 or >100 mg/dL and </=150 or >150 mg/dL. RESULTS: A glucose value of </=40 mg/dL occurred on 27% of nights and </=50 mg/dL on 35% of nights. There was a 2-fold increase (45% vs 22%, P =.015) in the incidence of hypoglycemia with a bedtime glucose </=100 mg/dL and a 1.7-fold increase (46% vs 26%, P =.01) with a value of </=150 mg/dL; most episodes occurred between 9 PM and 1 AM. There was no difference in hypoglycemia duration (86.4 minutes for glucose </=100 mg/dL vs 84.5 minutes for >100 mg/dL, P = NS), and no bedtime glucose value between 110 and 300 mg/dL decreased the incidence of nocturnal hypoglycemia to </=10%. The incidence of nocturnal hypoglycemia was similar for patients using insulin pump and injection therapy, and there was no correlation between hemoglobin A1c and incidence or duration of hypoglycemia. CONCLUSIONS: Nocturnal hypoglycemia is frequent, of long duration, associated with bedtime glucose values </=100 to 150 mg/dL, and predominately in the early part of the night. CGMS is a useful tool to diagnose asymptomatic nocturnal hypoglycemia.
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Authors | Francine Ratner Kaufman, Juliana Austin, Aaron Neinstein, Lily Jeng, Mary Halvorson, Debra J Devoe, Pisit Pitukcheewanont |
Journal | The Journal of pediatrics
(J Pediatr)
Vol. 141
Issue 5
Pg. 625-30
(Nov 2002)
ISSN: 0022-3476 [Print] United States |
PMID | 12410189
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
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Topics |
- Adult
- Blood Glucose
(analysis)
- Child
- Child, Preschool
- Diabetes Mellitus, Type 1
(blood)
- Female
- Humans
- Hypoglycemia
(diagnosis)
- Male
- Monitoring, Physiologic
(instrumentation)
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