TABLE 2

Quantitative Anti-HBs Titer Data

GroupaParticipant Titers, mIU/mL
1234567891011121314
1 (1-in needle)51.687.4143.6144.6189.7189.8208.9324.7b368.0383.9
2 (1.5-in needle)28.0181.6203.9243.0249.6274.3341.2349.6393.0429.2464.2473.1492.96471.0b
  • a Difference in titers between groups using Mann-Whitney test: P = .03 all participants and P = .035 with female participants only.

  • b Male participant.