Introduction: Multimorbidity (multiple chronic illnesses) greatly affects the delivery of health care and assessment of health care quality. There is a lack of basic epidemiologic data on multimorbidity in the United States. This article addresses the prevalence of 24 chronic illnesses and multimorbidity from primary care practices across the United States.Methods: This cross-sectional study was conducted in the PPRNet, a practice-based research network among 226 practices in 43 states that maintains a clinical database derived from a common electronic health record. Practices providing data as of October 1, 2011, and their active adult patients comprised the population used for analyses. The prevalence of each chronic illness and multimorbidity were calculated.Results: Included in these analyses were 148 practices with 667,379 active patients. Median prevalence across practices ranged from 35.8% for hypertension to 0.23% for Parkinson disease, with wide variability among practices for all conditions. Multimorbidity increased steeply with age, leveling off at age 80; overall, 45.2% of patients had more than one chronic illness.Conclusion: Multimorbidity is a prevalent problem in primary care practice, a finding with implications for health care delivery and payment, quality assessment, and research. (J Am Board Fam Med 2013;26:518-524.)

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The TDP for BP measurements is common. Although TDP effects on patients' BP measurements may appear modest, treatment of patients, especially women, with antihypertensive medication may be systematically affected by this preference.

Study Objective. To describe the management and control of hypertension in primary care practice. Design. Retrospective medical record review. Setting. Twenty primary care practices in 14 states. Patients. Thirteen thousand forty-seven patients with hypertension. Measurements and Main Results. Diagnoses, drugs prescribed, and blood pressure readings were extracted from the electronic medical record at each practice in the study. For patients with hypertension and comorbid diagnoses, the most recent blood pressure and antihypertensive drugs prescribed were determined. Analyses assessed the blood pressure control rates and the association between control and demographic variables, frequency of visits to the practice site, and pharmacologic treatment patterns. Among the 20 practices in the study, 13,047 patients had received a diagnosis of hypertension and their blood pressures had been measured within the previous 12 months. One third of the patients had comorbid coronary heart disease, diabetes mellitus, heart failure, and/or renal insufficiency. The most recent blood pressure reading was below 140/90 in half the patients. Control was associated with age 60 years or younger, female sex, more than one visit to the practice, more than one comorbidity, and type of practice (p<0.01, logistic regression). Wide variability was noted among practices in the use of multiagent antihypertensive therapy, and in antihypertensive therapy by drug class. Among patients without comorbidity treated with one drug, systolic blood pressure did not differ significantly by drug class. Diastolic blood pressure was slightly lower in patients prescribed thiazide diuretics than in those prescribed angiotensin receptor blockers (p=0.03, analysis of covariance). Conclusion. Blood pressure control in primary care practice can be much better than reports usually indicate. Good control in this study was not due to specific drug choice, but instead may have been due to regular monitoring of blood pressure and motivation of the practice to improve patient care.