(HealthDay)—Team care involving nurse-managed protocols is one model that may improve outpatient care for adults with chronic conditions, according to research published in the July 15 issue of the Annals of Internal Medicine.

Ryan J. Shaw, Ph.D., R.N., of the Durham Veterans Affairs Medical Center in North Carolina, and colleagues conducted a systematic review of the literature and a meta-analysis of data from 18 studies. The authors sought to assess the effects of nurse-managed protocols on the outpatient management of adults with diabetes, , and hyperlipidemia. All of the studies involved a , or equivalent, who titrated medications according to a protocol.

The researchers found that outpatients with diabetes receiving care under nurse-managed protocols experienced a 0.4 percent decrease in hemoglobin A1c level (eight patients; 95 percent confidence interval [CI], 0.1 to 0.7 percent). Those with hypertension (12 patients) experienced decreases in systolic and of 3.68 mm Hg (95 percent CI, 1.05 to 6.31 mm Hg) and 1.56 mm Hg (95 percent CI, 0.36 to 2.76 mm Hg), respectively. Individuals with had changes in lipid levels, including a 9.37-mg/dL decrease in total cholesterol level (nine patients; 95 percent CI, 20.77-mg/dL decrease to 2.02-mg/dL increase) and a 12.07-mg/dL decrease in low-density lipoprotein cholesterol level (six patients; 95 percent CI, 28.27-mg/dL decrease to 4.13-mg/dL increase).

"We need new models of primary care, and enlisting nurses will be central to this effort," write the authors of an accompanying editorial. "Recognizing that nurse-managed protocols work for common outpatient diseases may be one step toward solving America's primary care problem."