Table 1

Participant disposition

ParameterParticipant dispositionc (no. [%]) by groupTotal (no. [%])
PSV exposedPSV naïve
MCV4MPSV4MCV4
Participants145 (100)142 (100)163 (100)450 (100)
Vaccinateda144 (99)141 (99)161 (99)446 (99)
Completed study140 (97)136 (96)160 (98)436 (97)
Discontinued5 (3)6 (4)3 (2)14 (3)
    Lost to follow-up1 (<1)1 (<1)0 (0)2 (<1)
    Voluntary withdrawalb4 (3)5 (4)3 (2)12 (3)
Immunogenicity set144 (99)141 (99)161 (99)446 (99)
Safety analysis set144 (99)141 (99)160 (98)445 (99)
  • a Among the PSV-exposed participants, 1 participant scheduled to receive MCV4 and 1 scheduled to receive MPSV4 refused vaccination; 2 participants in the control group fainted after the prevaccination blood draw and withdrew from the study.

  • b None related to an adverse event.

  • c PSV exposed means participants who meningococcal polysaccharide vaccine before study entry. PSV naïve means participants who did not receive meningococcal polysaccharide vaccine before study entry. MCV4 indicates participants who received quadrivalent meningococcal conjugate vaccine. MPSV4 indicates participants who received quadrivalent meningococcal polysaccharide vaccine.