Improved access to and continuity of primary care after attachment to a family physician: longitudinal cohort study on centralized waiting lists for unattached patients in Quebec, Canada

Table 5 Results for the Bice-Boxerman Concentration of Care Index at the practice level by time period: descriptive statistics and GEE repeated measures model estimates, unadjusted and adjusted for potentially predisposing, need and enabling covariates

	Pre-attachment		Post-attachment
	T0–2 years	T0–1 year	T0 + 1 year	T0 + 2 years
Number of patients with at least 2 primary care visits^a	155,086	156,760	299,594	155,729
Concentration of care index – Practice-level
Mean (s.d.)	0.78 (0.34)	0.72 (0.37)	0.84 (0.30)	0.82 (0.32)
99% CI	0.78–0.79	0.71–0.72	0.83–0.84	0.81–0.82
Proportion (%) of patients with totally concentrated primary care (COCI = 1)	67	59	73	72
Proportion (%) of patients with totally dispersed primary care (COCI = 0.00)	9	12	5	7
Number of primary care visits^b
Mean (s.d.)	2.06 (2.82)	2.05 (2.74)	3.92 (3.12)	2.53 (2.80)
99% CI	2.05–2.07	2.04–2.06	3.90–3.93	2.52–2.54
Unadjusted regression
Exp (β)	1.00 (ref.)	0.78	1.17	1.12
99% CI		0.75–0.81	1.11–1.22	1.06–1.18
p-value		< 0.001	< 0.001	< 0.001
Adjusted regression^c
Exp (β)	1.00 (ref.)	0.80	1.19	1.15
99% CI		0.77–0.83	1.14–1.25	1.09–1.22
p-value		< 0.001	< 0.001	< 0.001

^aNumber of patients with valid data in the 12-mont time period
^bNumber of primary care visits is not included in this analysis, but ≥2 visits were required for a valid index. Number of visits is provided to indicate primary care utilization per time period
^cAdjusted for age, sex, Charlson Comorbidity Index, medical vulnerability and region remoteness

ISSN: 2731-4553