Smaller Pediatric Offices Have Higher In-Office Influenza Vaccination Rates

•� With each 10-fold increase in total patients, office-level vaccination coverage fell by 21% (P<0.001), 24% (P<0.001), 20% (P<0.001), and 24% (P<0.001) in each of the 4 study seasons, respectively (Figure 2). •� No other variable assessed (Table 2) was similarly correlated with coverage.