In exploratory analyses , postprimary and postbooster functional antibody geometric mean titers against MenC tended to be lower ( 1119.5 vs. 3200.5 ; 2653.8 vs. 6028.4 ) and antibody geometric mean concentrations against Hib higher ( 1.594 vs. 0.671 g/mL ; 17.678 vs. 13.737 g/mL ) in the Hepta versus the HexaMenC group .