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01.12.2014 | Research article | Ausgabe 1/2014 Open Access

BMC Family Practice 1/2014

What is the impact of primary care model type on specialist referral rates? A cross-sectional study

Zeitschrift:
BMC Family Practice > Ausgabe 1/2014
Autoren:
Clare Liddy, Jatinderpreet Singh, Ryan Kelly, Simone Dahrouge, Monica Taljaard, Jamie Younger
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1471-2296-15-22) contains supplementary material, which is available to authorized users.
An erratum to this article is available at http://​dx.​doi.​org/​10.​1186/​s12875-015-0260-7.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

CL and JS conceived the idea for this study. All authors contributed to the design of the analysis plan, while MT and JY conducted the data analysis. All authors critically reviewed and approved the final manuscript.

Abstract

Background

Several new primary care models have been implemented in Ontario, Canada over the past two decades. These practice models differ in team structure, physician remuneration, and group size. Few studies have examined the impact of these models on specialist referrals. We compared specialist referral rates amongst three primary care models: 1) Enhanced Fee-for-service, 2) Capitation- Non-Interdisciplinary (CAP-NI), 3) Capitation – Interdisciplinary (CAP-I).

Methods

We conducted a cross-sectional study using health administrative data from primary care practices in Ontario from April 1st, 2008 to March 31st, 2010. The analysis included all family physicians providing comprehensive care in one of the three models, had at least 100 patients, and did not have a prolonged absence (eight consecutive weeks). The primary outcome was referral rate (# of referrals to all medical specialties/1000 patients/year). A multivariable clustered Poisson regression analysis was used to compare referral rates between models while adjusting for provider (sex, years since graduation, foreign trained, time in current model) and patient (age, sex, income, rurality, health status) characteristics.

Results

Fee-for-service had a significantly lower adjusted referral rate (676, 95% CI: 666-687) than the CAP-NI (719, 95% confidence interval (CI): 705-734) and CAP-I (694, 95% CI: 681-707) models and the interdisciplinary CAP-I group had a 3.5% lower referral rate than the CAP-NI group (RR = 0.965, 95% CI: 0.943-0.987, p = 0.002). Female and Canadian-trained physicians referred more often, while female, older, sicker and urban patients were more likely to be referred.

Conclusions

Primary care model is significantly associated with referral rate. On a study population level, these differences equate to 111,059 and 37,391 fewer referrals by fee-for-service versus CAP-NI and CAP-I, respectively – a difference of $22.3 million in initial referral appointment costs. Whether a lower rate of referral is more appropriate or not is not known and requires further investigation. Physician remuneration and team structure likely account for the differences; however, further investigation is also required to better understand whether other organizational factors associated with primary care model also impact referral.
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