Urine cortisol/creatinine ratio in controlled insulin-induced hypoglycemia.
An elevated urine cortisol/creatinine ratio has been presented as a simple laboratory method to detect nocturnal hypoglycemia. The present study examines the time course of the rise and fall of the urine cortisol/creatinine ratio in 11 patients following insulin-induced hypoglycemia. The mean urine cortisol/creatinine ratios at 1 and 3 h after the onset of symptomatic hypoglycemia were 170 +/- 103 and 62 +/- 23, respectively. These were significantly greater (P less than 0.01) than the basal ratio of 13 +/- 7. By 5 h, the ratio had fallen to 19 +/- 11, which was similar to basal values. The study documents the sensitivity of the urine cortisol/creatinine ratio in detecting hypoglycemia but indicates that after 3 h, the ratio may return to normal despite a previous hypoglycemic episode.
D003404:Creatinine / Q000652:urine*; D048909:Diabetes Complications; D006801:Humans; D006854:Hydrocortisone / Q000652:urine*; D007003:Hypoglycemia / Q000139:chemically induced / Q000175:diagnosis* / Q000652:urine; D007328:Insulin / Q000009:adverse effects*
D007328:Insulin; D003404:Creatinine; D006854:Hydrocortisone