Glycosylated hemoglobin and the risk of microalbuminuria in patients with insulin-dependent diabetes mellitus - PubMed (original) (raw)
. 1995 May 11;332(19):1251-5.
doi: 10.1056/NEJM199505113321902.
Affiliations
- PMID: 7708068
- DOI: 10.1056/NEJM199505113321902
Free article
Glycosylated hemoglobin and the risk of microalbuminuria in patients with insulin-dependent diabetes mellitus
A S Krolewski et al. N Engl J Med. 1995.
Free article
Abstract
Background: The risk of microalbuminuria in patients with insulin-dependent diabetes mellitus (IDDM) is thought to depend on the degree of hyperglycemia, but the relation between the degree of hyperglycemia and urinary albumin excretion has not been defined.
Methods: We measured urinary albumin excretion in three random urine samples obtained at least one month apart from 1613 patients with IDDM. Microalbuminuria or overt albuminuria was considered to be present if the ratio of albumin (in micrograms) to creatinine (in milligrams) was 17 to 299 or > or = 300, respectively, for men and 25 to 299 or > or = 300, respectively, for women. Measurements of glycosylated hemoglobin (hemoglobin A1) obtained up to four years before the urine testing were used as an index of hyperglycemia. Twelve percent of the patients had overt albuminuria and were excluded from subsequent analyses.
Results: The prevalence of microalbuminuria was 18 percent in patients with IDDM. It increased with increasing postpubertal duration of diabetes and, within each six-year interval of disease duration, it increased nonlinearly with the hemoglobin A1 value. For hemoglobin A1 values below 10.1 percent, the slope of the relation was almost flat, whereas for values above 10.1 percent, the prevalence of microalbuminuria rose steeply (P < 0.001). For example, as the hemoglobin A1 value increased from 8.1 to 10.1 percent, the odds of microalbuminuria increased by a factor of 1.3, but as the value increased from 10.1 to 12.1 percent, the odds were increased by a factor of 2.4.
Conclusions: The risk of microalbuminuria in patients with IDDM increases abruptly above a hemoglobin A1 value of 10.1 percent (equivalent to a hemoglobin A1c value of 8.1 percent), suggesting that efforts to reduce the frequency of diabetic nephropathy should be focused on reducing hemoglobin A1 values that are above this threshold.
Comment in
- Glycosylated hemoglobin and the risk of microalbuminuria in insulin-dependent diabetes mellitus. EURODIAB IDDM Complications Study Group.
Chaturvedi N, Fuller JH. Chaturvedi N, et al. N Engl J Med. 1995 Oct 5;333(14):940-1. doi: 10.1056/NEJM199510053331414. N Engl J Med. 1995. PMID: 7666888 No abstract available. - A glycemic threshold for diabetic complications?
Viberti G. Viberti G. N Engl J Med. 1995 May 11;332(19):1293-4. doi: 10.1056/NEJM199505113321909. N Engl J Med. 1995. PMID: 7708075 No abstract available.
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