Association between primary care and acute care services utilization in the year following diagnosis of breast cancer.

Abstract

e13522 Background: Primary care physicians (PCPs) play a pivotal role during cancer diagnosis. Lack of access to primary care has been linked to worse outcomes including increased mortality in patients with cancer. Higher PCP continuity of care has been associated with lower likelihood of acute care services use among breast cancer survivors, however the impact of PCP utilization is not well studied in those newly diagnosed. This study examines the association between PCP visits and emergency department (ED) use and hospitalization in the year following diagnosis of breast cancer. Methods: Electronic medical records of women newly diagnosed with primary breast cancer from 2013 to 2019 at a single institution (Tufts Medical Center, Boston, Massachusetts) with an established PCP in the same system were retrospectively reviewed. Demographic (age at diagnosis, menopausal status, race/ethnicity), clinical (Charlson Comorbidity Index (CCI), Eastern Cooperative Oncology Group (ECOG) performance status, body mass index, mental health disorder, chronic pain syndrome), and tumor (histology, stage, grade, hormone receptor (HR) positivity, HER2 status) characteristics were extracted in addition to information on treatment modalities (if patient received surgery, radiation (RT), chemotherapy (CT), endocrine therapy (ET), ovarian suppression (OFS)). Univariate and multivariate logistic regression models were used to examine associations between frequency of PCP visits and ED use and hospitalizations within a year after diagnosis of breast cancer. Results: Of 182 women ages 33-93 (mean 60) years old, 131 (72%) were postmenopausal, 116 (64%) Caucasian; 176 (97%) had stages 1-3, and 157 (86%) had HR positivity. In the year following diagnosis, 178 (98%) received surgery, 127 (67%) RT, 142 (78%) ET, 19 (10%) OFS, 70 (39%) CT; 68 (37%) had ≤1 PCP visit, and 45 (25%) had 4-10 PCP visits. Increased PCP visits correlated with advancing age, increased BMI, greater mental health disorders and chronic pain syndromes, and increasing CCI and ECOG score. After adjusting for these confounders and tumor and treatment characteristics, logistic regressions showed that while frequency of PCP visits was not associated with hospitalizations (univariate: OR = 1.02, 95% CI [0.53, 1.62], p = 0.93; multivariate: OR = 0.35, 95% CI [0.05, 1.50], p = 0.184), increased PCP visits tended toward association with increased ED use (univariate: OR = 1.12, 95% CI [0.97,1.29], p = 0.124; multivariate: OR = 1.15, 95% CI [0.94, 1.41], p = 0.188), however did not demonstrate statistical significance. Conclusions: Primary care utilization was not associated with acute care services utilization in women newly diagnosed with breast cancer. Higher PCP utilization tended toward correlation with increased ED use. These findings may help in evaluating multidisciplinary care support in patients newly diagnosed with breast cancer.