In regression analyses , a child 's likelihood of being vaccinated was significantly higher with : younger age , white race ( Odds ratio [ OR ] = 1.29 ; 95 % confidence interval [ CI ] = 1.23-1 .34 ) , having commercial insurance ( OR = 1.30 ; 95 % CI = 1.25-1 .35 ) , higher pre-intervention practice vaccination rate ( OR = 1.25 ; 95 % CI = 1.16-1 .34 ) , and being in the Intervention arm ( OR = 1.23 ; 95 % CI = 1.01-1 .50 ) .