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 4 Results for the Bice-Boxerman Concentration of Care Index at the physician 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 – Physician-level
Mean (s.d.)	0.56 (0.43)	0.45 (0.42)	0.72 (0.37)	0.64 (0.41)
99% CI	0.55–0.56	0.44–0.45	0.71–0.72	0.63–0.64
Proportion (%) of patients with totally concentrated primary care (COCI = 1)	44	32	59	51
Proportion (%) of patients with totally dispersed primary care (COCI = 0.00)	24	31	10	17
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.)	0.74	1.46	1.18
99% CI		0.71–0.76	1.38–1.53	1.13–1.23
p-value		< 0.001	< 0.001	< 0.001
Adjusted regression^c
Exp (β)	1.00 (ref.)	0.76	1.53	1.22
99% CI		0.74–0.79	1.47–1.60	1.16–1.28
p-value		< 0.001	< 0.001	< 0.001

^aNumber of patients with valid data in the 12-month 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