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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

From: 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

 

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 visitsa

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 visitsb

 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 regressionc

 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

  1. aNumber of patients with valid data in the 12-month time period
  2. 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
  3. cAdjusted for age, sex, Charlson Comorbidity Index, medical vulnerability and region remoteness