Interpersonal Primary Care Continuity for Chronic Conditions Is Associated with Fewer Hospitalizations and Emergency Department Visits Among Medicaid Enrollees.

BACKGROUND: Interpersonal primary care continuity or chronic condition continuity (CCC) is associated with improved health outcomes. Ambulatory care-sensitive conditions (ACSC) are best managed in a primary care setting, and chronic ACSC (CACSC) require management over time. However, current measures do not measure continuity for specific conditions or the impact of continuity for chronic conditions on health outcomes. The purpose of this study was to design a novel measure of CCC for CACSC in primary care and determine its association with health care utilization. METHODS: We conducted a cross-sectional analysis of continuously enrolled, nondual eligible adult Medicaid enrollees with a diagnosis of a CACSC using 2009 Medicaid Analytic eXtract files from 26 states. We conducted adjusted and unadjusted logistic regression models of the relationship between patient continuity status and emergency department (ED) visits and hospitalizations. Models were adjusted for age, sex, race/ethnicity, comorbidity, and rurality. We defined CCC for CACSC as at least 2 outpatient visits with any primary care physician for a CACSC in the year, and (2) more than 50% of outpatient CACSC visits with a single PCP. RESULTS: There were 2,674,587 enrollees with CACSC and 36.3% had CCC for CACSC visits. In fully adjusted models, enrollees with CCC were 28% less likely to have ED visits compared with those without CCC (aOR = 0.71, 95% CI = 0.71 - 0.72) and were 67% less likely to have hospitalization than those without CCC (aOR = 0.33, 95% CI = 0.32-0.33). CONCLUSIONS: CCC for CACSCs was associated with fewer ED visits and hospitalizations in a nationally representative sample of Medicaid enrollees.

Primary Care Comprehensiveness and Care Coordination in Robust Specialist Networks Results in Lower Emergency Department Utilization: A Network Analysis of Medicaid Physician Networks.

Background: Care coordination is an essential and difficult to measure function of primary care. Objective: Our objective was to assess the impact of network characteristics in primary/specialty physician networks on emergency department (ED) visits for patients with chronic ambulatory care sensitive conditions (ACSCs). Subjects and Measures: This cross-sectional social network analysis of primary care and specialty physicians caring for adult Medicaid beneficiaries with ACSCs was conducted using 2009 Texas Medicaid Analytic eXtract (MAX) files. Network characteristic measures were the main exposure variables. A negative binomial regression model analyzed the impact of network characteristics on the ED visits per patient in the panel. Results: There were 42 493 ACSC patients assigned to 5687 primary care physicians (PCPs) connected to 11 660 specialist physicians. PCPs whose continuity patients did not visit a specialist had 86% fewer ED visits per patient in their panel, compared with PCPs whose patients saw specialists. Among PCPs connected to specialists in the network, those with a higher number of specialist collaborators and those with a high degree of centrality had lower patient panel ED rates. Conclusions: PCPs providing comprehensive care (ie, without specialist consultation) for their patients with chronic ACSCs had lower ED utilization rates than those coordinating care with specialists. PCPs with robust specialty networks and a high degree of centrality in the network also had lower ED utilization. The right fit between comprehensiveness of primary care, care coordination, and adequate capacity of specialty availability in physician networks is needed to drive outcomes.

Impact of individual- and area-level race/ethnicity on illness intrusiveness among cancer survivors.

Many cancer survivors experience illness intrusion or disruption in various life domains from cancer. The socioecological model posits that individual health status is produced by the interaction of individual biology and their surrounding physical, social, and cultural environment. Despite evidence of the need to consider such hierarchical influences, little is known about the impact of area-level factors on cancer-related outcomes, including illness intrusiveness. Data from 993 breast, colorectal, and prostate cancer survivors within the first year of completing treatment were analyzed. Individual-level data for the Illness Intrusiveness Ratings Scale were linked to census tract-level data to characterize neighborhood conditions. Logistic regression modeled the association between individual-level variables, neighborhood-level racial composition, and the interaction between individual and area-level race on illness intrusiveness. A significant number of survivors (232, 23.4%) reported relatively high illness intrusiveness (score >28). The model including the interaction between area- and individual-level race exhibited significantly improved model fit (p < .05). The final model showed that racial minorities living in areas with a higher percentage of racial minorities had higher odds of greater illness intrusion when compared to Whites living in areas with a low percentage of racial minorities (adjusted odds ratio: 1.65, confidence interval: 1.01, 2.68). Results suggest that area-level factors can have profound effects on survivors' processing of their past cancer experience. Findings may support the collective resources model which posits that the effect of area deprivation is greater in certain sociodemographic groups who may find it difficult to seek resources outside of their living area.