Did Arkansas' Medicaid Patient-Centered Medical Home Program Have Spillover Effects on Commercially Insured Enrollees?

Geographic proximity to primary care providers as a risk-assessment criterion for quality performance measures

Importance

Previous studies have found a mixed association between Patient-Centered Medical Home (PCMH) designation and improvements in primary care quality indicators, including avoidable pediatric emergency department (ED) encounters. Whether these associations persist after accounting for the geographic locations of providers relative to where patients reside is unknown.

Objective

To examine the association between geographic proximity to primary care providers versus hospitals and risk of avoidable and potentially avoidable ED visits among children with pre-existing diagnosis of attention-deficit/hyperactivity disorder or asthma.

Methods

Retrospective cohort study of a panel of pediatric Medicaid claims data from the South Carolina from 2016–2018 for 2,959 beneficiaries having a pre-existing diagnosis of attention-deficit/hyperactivity disorder (ADD, ages 6–12) and 6,390 beneficiaries with asthma (MMA, ages 5–18), as defined using Healthcare Effectiveness Data and Information Set (HEDIS) performance measures. We calculated differences in avoidable and potentially avoidable ED visits by the beneficiary’s PCMH attribution type and in relation to differences in proximity to their primary care providers versus hospitals. Outcomes were defined using the New York University Emergency Department Algorithm (NYU-EDA). Differences in ED visit risk were assessed using generalized estimation equations and compared using marginal effects models.

Results

The 2.4 percentage point reduction in risk of avoidable ED visits among children in the ADD cohort who attended a PCMH versus those who did not increased to 3.9 to 7.2 percentage points as relative proximity to primary care providers versus hospitals improved (p < 0.01). Children in the ADD and MMA cohorts that were enrolled in a medical home, but did not attend one for primary care services exhibited a 5.4 and 3.0 percentage point increase in avoidable ED visit compared to children who were unenrolled and did not attend medical homes (p < 0.05), but these differences were only observed when geographic proximity to hospitals was more convenient than primary care providers. Mixed findings were observed for potentially avoidable visits.

Conclusions

In several health care performance evaluations, patient-centered medical homes have not been found to reduce differences in hospital utilization for conditions that are treatable in primary care settings among children with chronic illnesses. Analytical approaches that also consider geographic proximity to health care services can identify performance benefits of medical homes. Expanding risk-adjustment models to also include geographic data would benefit ongoing quality improvement initiatives.

The Medical Home Initiative in Italy: an Analysis of Changes in Healthcare Utilization

BACKGROUND

Seventeen medical homes (MHs) were established in the Local Health Authority (LHA) of Parma (about 450,000 residents), Emilia Romagna, Italy, between 2011 and 2016.

OBJECTIVE

To estimate the effects of MH implementation on healthcare utilization.

DESIGN

We conducted a longitudinal cohort study (01/2011-12/2017) using the Parma LHA administrative healthcare database.

PARTICIPANTS

Residents for ≥1 year and older than 14 years of age with a documented primary care physician (PCP) in Parma LHA.

INTERVENTION

MH exposure status was classified for each resident as either receiving care from a PCP that (1) eventually practices in an MH (pre-MH), (2) is currently in an MH (post-MH), or (3) does not join an MH (non-MH).

MAIN OUTCOME MEASURES

Risks of ordinary inpatient hospital admissions, day hospital admissions, admissions for ambulatory care sensitive conditions (ACSCs), all-cause emergency department (ED) visits, and deferrable ED visits were compared using Cox proportional hazards regression and risks of all-cause 30- and 90-day readmissions for congestive heart failure (CHF) or chronic obstructive pulmonary disease (COPD) were compared using logistic regression.

KEY RESULTS

Prior to MH implementation, the risk of all-cause ED visits for pre-MH residents was 0.93 (95% CI: 0.92-0.94) that of non-MH residents. After MH implementation, the relative risk for post-MH versus non-MH was 0.86 (95% CI: 0.85-0.87) and, over time, post-MH versus pre-MH was 0.93 (95% CI: 0.92-0.94). Hospitalization risks were generally lower among the pre-MH and post-MH, compared to non-MH. However, hospitalizations and HF or COPD readmissions were not generally lower post-MH compared to pre-MH.

CONCLUSIONS

This MH initiative was associated with a 7% reduction in risk of ED visits. More research is necessary to understand if ED visit risk will continue to improve and how other aspects of healthcare utilization might change as more MHs open and the length of exposure to MHs increases.

Women's experience of agency and respect in maternity care by type of insurance in California

OBJECTIVE

Public insurance (Medicaid) covered 42% of all U.S. births in 2018. This paper describes and analyzes the self-reported experiences of women with Medicaid versus commercial insurance relating to autonomy, control and respectful treatment in maternity care.

METHODS

The sampling frame for the Listening to Mothers in California survey was drawn from 2016 California birth certificate files. The 30-minute survey had a 55% response rate. A secondary multivariable analysis of results from the survey included 2,318 women with commercial private insurance (1,087) or public (Medi-Cal) (1,231) coverage. Results were weighted and were representative of all births in 2016 in California. The multivariable analysis of variables related to maternal agency included engagement in decision making regarding interventions such as vaginal birth after cesarean and episiotomy, feeling pressured to have interventions and sense of fair treatment. We examined their relationship to insurance status adjusted for maternal age, race/ethnicity, education, nativity and attitude toward birth as well as type of prenatal provider, type of birth attendant and pregnancy complications.

RESULTS

Women with Medi-Cal had a demographic profile distinct from those with commercial insurance. In multivariable analysis, women with Medi-Cal reported less control over their maternity care experience than women with commercial insurance, including less choice of prenatal provider (AOR 1.61 95%C.I. 1.20, 2.17), or a vaginal birth after cesarean (AOR 2.93 95%C.I. 1.49, 5.73). Mothers on Medi-Cal were also less likely to be consulted before experiencing an episiotomy (AOR 0.30 95%C.I. 0.09, 0.94). They were more likely to report feeling pressure to have a primary cesarean (AOR 2.54 95%C.I. 1.55, 4.16) and less likely to be encouraged by staff to make their own decisions (AOR 0.63 95%C.I. 0.47, 0.85).

CONCLUSIONS

Childbearing women with public insurance in California clearly and consistently reported less opportunity to choose their care than women with private insurance. These inequities are a call to action for increased accountability and quality improvement relating to care of the many childbearing women with Medicaid coverage.