A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances.
The Potentially Poor Response to Outpatient Diabetes Care in Urban African-Americans O R I G I N A L A R T I C L EOBJECTIVE -HbA 1c levels can be reduced in populations of diabetic patients, but some individuals may exhibit little improvement. To search for reasons underlying differences in HbA 1c outcome, we analyzed patients managed in an outpatient diabetes clinic.
RESEARCH DESIGN AND METHODS -African-Americans with type 2 diabetes were categorized as responders, intermediate responders or poor responders according to theirHbA 1c level after 1 year of care. Logistical regression was used to determine baseline characteristics that distinguished poor responders from responders. Therapeutic strategies were examined for each of the response categories.RESULTS -The 447 patients had a mean age and disease duration of 58 and 5 years, respectively, and BMI of 32 kg/m 2 . Overall, the mean HbA 1c level fell from 9.6 to 8.1% after 12 months. Mean HbA 1c levels improved from 8.8 to 6.2% in responders, and from 9.5 to 7.9% in intermediate responders. In poor responders, the average HbA 1c level was 10.8% on presentation and 10.9% at 1 year. The odds of being a poor responder were significantly increased with longer disease duration, higher initial HbA 1c level, and greater BMI. Although doses of oral agents and insulin were significantly higher among poor responders at most visits, the acceleration of insulin therapy did not occur until late in the follow-up period.CONCLUSIONS -Clinical diabetes programs need to devise methods to identify patients who are at risk for persistent hyperglycemia. Whereas patient characteristics explain some heterogeneity of HbA 1c outcome (and may aid in earlier identification of patients who potentially may not respond to conventional treatment), insufficient intensification of therapy may also be a component underlying the failure to achieve glycemic goals.
C l i n i c a l C a r e / E d u c a t i o n / N u t r i t i o n
210DIABETES CARE, VOLUME 24, NUMBER 2, FEBRUARY 2001Poor response to diabetes care visits were anticipated over the course of 1 year. In type 2 diabetic patients presenting without symptomatic hyperglycemia, medications were traditionally reduced or discontinued (regardless of the presenting HbA 1c value) to permit an intensive 2-month trial of nonpharmacological management. If glycemic goals (HbA 1c Յ7.0%) were not met by the end of this 2-month period, pharmacological therapy was reinstituted or advanced.
Patient selectionPatients were selected from an on-site patient registry if they had type 2 diabetes, had initial visits between 1 January 1992 and 31 December, 1996, and returned for scheduled follow-up appointments at 2, 4, 6, and 12 months; these return visits represented times when HbA 1c values were typically obtained (9). As previously reported (9), other than being slightly older, the characteristics (e.g., presenting BMI, HbA 1c lev...