• Robert Farmer and Rishi Patel.
• Family physician and Clinical Instructor for the Island Medical Programme on Vancouver Island, BC. bob.farmer@ubc.ca.
• Can Fam Physician. 2021 May 1; 67 (5): e121-e129.

ObjectiveTo characterize primary care physician and nurse practitioner ("GP") workload and availability, and any relationship with daytime, low-acuity emergency department (ED) and after-hours walk-in clinic (WIC) visit counts.DesignRetrospective database review.SettingTimmins, Ont, with 5 family health team (FHT) office sites, 1 after-hours FHT WIC, and 1 ED.ParticipantsAn anonymous data set representing 21 voluntarily enrolled GPs comprising 33 211 office appointments among 15 908 patients, plus 2043 ED visits and 2713 WIC visits, over 18 months.Main Outcome MeasuresRoster size corrections for inactive ("dormant") patients, nursing supports, and patient complexity (age and sex). Availability of GPs was defined as the corrected number of office visits per patient per year. Linear and nonlinear relationships between GP availability and each roster's chronic disease burden (congestive heart failure, chronic obstructive pulmonary disease, and diabetes); ED visit count per patient; and WIC visit count per patient.ResultsCorrections for dormant patients and then for each of relative nursing support and patient complexity changed roster sizes by a mean (SD) of -8.4% (14.5%), -7.1% to 5.6% (median -1.6%), and 32.0% (18.2%), respectively. Combining these corrections increased effective roster size by a mean (SD) of 18.4% (7.3%). Larger rosters were not proportionately more dormant. In the Timmins FHT, GPs saw unique patients about 2.05 times per year (range 1.39 to 3.81). Availability of GPs did not change with increasing numbers of patients with congestive heart failure, chronic obstructive pulmonary disease, or diabetes in the roster. The ED diversion model had low explanatory power and was likely unreliable. The WIC diversion model was more robust, predicting 0.08 fewer WIC visits per patient per year if GP availability increased from 2.0 to 3.0 visits per patient per year (relative risk reduction of 41%).ConclusionSampled GPs manage a more complex patient population on average than their uncorrected roster sizes imply. There was no evidence that larger rosters or those with more patients with comorbid conditions reduced GP availability. Increasing physician availability might decrease WIC attendance.Copyright © the College of Family Physicians of Canada.

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