Outcomes of Less Intensive Glycemic Target for a Subcutaneous Insulin Protocol in Hospitalized Patients

Abstract

This study looked at the effect of replacing an intensive subcutaneous insulin correction protocol (old subcutaneous insulin correction protocol [OP]) with a less intensive protocol (new subcutaneous insulin correction protocol [NP]) in a tertiary hospital with the hypothesis that using the NP will result in less hypoglycemia and improved hospital outcomes. The charts for 200 hospitalized patients managed with the OP (glycemic target 90-116 mg/dL for intensive care and 90-130 mg/dL for nonintensive care patients) and 200 with the NP (glycemic target 150-200 mg/dL) were reviewed. Data were collected and analyzed using Fisher's exact test and Student's t test. The primary outcome was the difference in hypoglycemia rates between the 2 protocols. Hypothesis test P values of <0.05 were deemed significant. There was no statistically significant difference in age, sex, ethnicity, body mass index, level of hospital care or use of scheduled insulin for the 2 groups (P > 0.05 for all). Average blood glucose values were 160.45 and 169.98 mg/dL for the OP and NP, respectively (P = 0.063). There were 14 readings ≤ 40 mg/dL in the OP compared with 6 in the NP (P = 0.046). With the OP, 27 patients required dextrose treatment compared to 11 with the NP (P = 0.0097). The average length of hospitalization was longer for the NP compared with the OP (13.16 versus 6.56 days, P = 0.00085). A less intensive subcutaneous insulin correction protocol in hospitalized patients resulted in similar glucose values with less severe hypoglycemia. However, it was associated with longer length of hospitalization.