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Table 4—

Age-, sex-, and Charlson Comorbidity Index-adjusted process of care index (Poisson mean) and composite outcome measure (Poisson mean) at baseline and after intervention with change, net difference, and statistical significance of the net difference in measures between intervention and control clinics

BaselineIntervention periodChangeNet difference (I2 − I1) − (C2 − C1)P value*
Process of Care Index      
    IMPACT clinics 3.29 ± 0.114 4.58 ± 0.110 1.29 ± 0.042 1.07 ± 0.044 <0.001 
    Control clinics 3.48 ± 0.114 3.70 ± 0.113 0.22 ± 0.038   
Composite outcome      
    IMPACT clinics 1.22 ± 0.054 1.39 ± 0.061 0.17 ± 0.030 0.15 ± 0.030 0.002 
    Control clinics 1.16 ± 0.052 1.18 ± 0.053 0.02 ± 0.029   
BaselineIntervention periodChangeNet difference (I2 − I1) − (C2 − C1)P value*
Process of Care Index      
    IMPACT clinics 3.29 ± 0.114 4.58 ± 0.110 1.29 ± 0.042 1.07 ± 0.044 <0.001 
    Control clinics 3.48 ± 0.114 3.70 ± 0.113 0.22 ± 0.038   
Composite outcome      
    IMPACT clinics 1.22 ± 0.054 1.39 ± 0.061 0.17 ± 0.030 0.15 ± 0.030 0.002 
    Control clinics 1.16 ± 0.052 1.18 ± 0.053 0.02 ± 0.029   

Data are mean ± SEM number of criteria measured.

*

P value based on d.f. = 22.

Process of Care Index includes annual blood pressure monitoring, renal testing, eye examination, foot examination, A1C testing, and LDL cholesterol testing. C1, control practices at baseline; C2, control practices at 12 months; I1, intervention practices at baseline; I2, intervention practices at 12 months.

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