1. Ambulatory Care Fragmentation and Subsequent Hospitalization
- Author
-
Lawrence P. Casalino, Lisandro D. Colantonio, Monika M. Safford, Mangala Rajan, Joanna Bryan Ringel, Evgeniya Reshetnyak, Lisa M. Kern, and Laura C. Pinheiro
- Subjects
Male ,medicine.medical_specialty ,Health Behavior ,Medicare ,Article ,03 medical and health sciences ,Sex Factors ,0302 clinical medicine ,Ambulatory care ,Risk Factors ,Ambulatory Care ,Humans ,Medicine ,Longitudinal Studies ,030212 general & internal medicine ,Risk factor ,Aged ,Proportional Hazards Models ,Aged, 80 and over ,business.industry ,Proportional hazards model ,030503 health policy & services ,Racial Groups ,Confounding ,Hazard ratio ,Age Factors ,Public Health, Environmental and Occupational Health ,Fee-for-Service Plans ,Continuity of Patient Care ,United States ,Confidence interval ,Hospitalization ,Socioeconomic Factors ,Ambulatory ,Emergency medicine ,Female ,0305 other medical science ,business ,Psychosocial - Abstract
Background Previous studies have suggested that highly fragmented ambulatory care increases the risk of subsequent hospitalization, but those studies used claims only and were not able to adjust for many clinical potential confounders. Objective The objective of this study was to determine the association between fragmented ambulatory care and subsequent hospitalization, adjusting for demographics, medical conditions, medications, health behaviors, psychosocial variables, and physiological variables. Design Longitudinal analysis of data (2003-2016) from the nationwide REasons for Geographic And Racial Differences in Stroke (REGARDS) study, linked to Medicare fee-for-service claims. Subjects A total of 12,693 Medicare beneficiaries 65 years and older from the REGARDS study who had at least 4 ambulatory visits in the first year of observation and did not have a hospitalization in the prior year. Measures We defined high fragmentation as a reversed Bice-Boxerman score above the 75th percentile. We used Cox proportional hazards models to determine the association between fragmentation as a time-varying exposure and incident hospitalization in the 3 months following each exposure period. Results The mean age was 70.4 years; 54% were women, and 33% were African American. During the first year of observation, participants with high fragmentation had a median of 8 ambulatory visits with 6 providers, whereas participants with low fragmentation had a median of 7 visits with 3 providers. Over 11.8 years of follow-up, 6947 participants (55%) had a hospitalization. High fragmentation was associated with an increased hazard of hospitalization (adjusted hazard ratio=1.18; 95% confidence interval: 1.12, 1.24). Conclusion Highly fragmented ambulatory care is an independent risk factor for hospitalization.
- Published
- 2020