Association between federally qualified health center usage and emergency department utilization among California’s HIV-infected Medicaid beneficiaries, 2009

Jeremy Y. Chow, W. Scott Comulada, Jennifer L. Gildner, Katherine A. Desmond, Arleen A. Leibowitz

Research output: Contribution to journalArticle

Abstract

Federally Qualified Health Centers (FQHCs) have long been important sources of care for publicly insured people living with HIV. FQHC users have historically used emergency departments (EDs) at a higher-than-average rate. This paper examines whether this greater use relates to access difficulties in FQHCs or to characteristics of FQHC users. Zero-inflated Poisson models were used to estimate how FQHC use related to the odds of being an ED user and annual number of ED visits, using claims data on 6,284 HIV-infected California Medicaid beneficiaries in 2008–2009. FQHC users averaged significantly greater numbers of annual ED visits than non-FQHC users and those with no outpatient usage (1.89, 1.59, and 1.70, respectively; P = 0.043). FQHC users had higher odds of being ED users (OR = 1.14; 95%CI 1.02-1.27). In multivariable analyses, FQHC clients had higher odds of ED usage controlling for demographic and service characteristics (OR = 1.15; 95%CI 1.02-1.30) but not when medical characteristics were included (OR = 1.08; 95%CI 0.95-1.24). Among ED users, FQHC use was not significantly associated with the number of ED visits in our models (rate ratio (RR) = 1.00; 95%CI 0.87-1.15). The overall difference in mean annual ED visits observed between FQHC and non-FQHC groups was reduced to insignificance (1.75; 95% CI 1.59-1.92 vs 1.70; 95%CI 1.54-1.85) after adjusting for demographic, service, and medical characteristics. Overall, FQHC users had higher ED utilization than non-FQHC users, but the disparity was largely driven by differences in underlying medical characteristics.

Original languageEnglish (US)
JournalAIDS Care - Psychological and Socio-Medical Aspects of AIDS/HIV
DOIs
StateAccepted/In press - Jan 1 2018

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Medicaid
Hospital Emergency Service
utilization
HIV
Health
health
Demography
Outpatients

Keywords

  • California
  • emergency department
  • Federally Qualified Health Center
  • HIV
  • Medicaid

ASJC Scopus subject areas

  • Health(social science)
  • Social Psychology
  • Public Health, Environmental and Occupational Health

Cite this

Association between federally qualified health center usage and emergency department utilization among California’s HIV-infected Medicaid beneficiaries, 2009. / Chow, Jeremy Y.; Comulada, W. Scott; Gildner, Jennifer L.; Desmond, Katherine A.; Leibowitz, Arleen A.

In: AIDS Care - Psychological and Socio-Medical Aspects of AIDS/HIV, 01.01.2018.

Research output: Contribution to journalArticle

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abstract = "Federally Qualified Health Centers (FQHCs) have long been important sources of care for publicly insured people living with HIV. FQHC users have historically used emergency departments (EDs) at a higher-than-average rate. This paper examines whether this greater use relates to access difficulties in FQHCs or to characteristics of FQHC users. Zero-inflated Poisson models were used to estimate how FQHC use related to the odds of being an ED user and annual number of ED visits, using claims data on 6,284 HIV-infected California Medicaid beneficiaries in 2008–2009. FQHC users averaged significantly greater numbers of annual ED visits than non-FQHC users and those with no outpatient usage (1.89, 1.59, and 1.70, respectively; P = 0.043). FQHC users had higher odds of being ED users (OR = 1.14; 95{\%}CI 1.02-1.27). In multivariable analyses, FQHC clients had higher odds of ED usage controlling for demographic and service characteristics (OR = 1.15; 95{\%}CI 1.02-1.30) but not when medical characteristics were included (OR = 1.08; 95{\%}CI 0.95-1.24). Among ED users, FQHC use was not significantly associated with the number of ED visits in our models (rate ratio (RR) = 1.00; 95{\%}CI 0.87-1.15). The overall difference in mean annual ED visits observed between FQHC and non-FQHC groups was reduced to insignificance (1.75; 95{\%} CI 1.59-1.92 vs 1.70; 95{\%}CI 1.54-1.85) after adjusting for demographic, service, and medical characteristics. Overall, FQHC users had higher ED utilization than non-FQHC users, but the disparity was largely driven by differences in underlying medical characteristics.",
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