Anti-tetanus toxoid antibody IgG geometric mean concentrations were lower in the consistent limb group ( @ IU/mL -LSB- @ % CI @-@ -RSB- ) than in the alternating limb group ( @ IU/mL -LSB- @-@ -RSB- ) at @ months ( p = @ ) and at @ months ( @ IU/mL -LSB- @-@ -RSB- vs @ IU/mL -LSB- @-@ -RSB- ; p = @ ) .