TABLE 1.

Serion anti-PT IgG levels in paired serum samples collected from all participantsa

Sample groupb (no. of samples)Geometric mean activity (FDA U/ml)d
S1S2
1 (361)6.0 (5.6, 6.5)4.8 (4.5, 5.2)
2c (64)37.8 (31.7, 45.2)37.4 (33.5, 41.8)
3 (39)165.4 (142.3, 192.3)100.0 (82.9, 120.5)
  • a Samples were collected at entry into military service (S1) and 8 months later (S2). Paired serum samples were grouped on the basis of Serion PT IgG activity.

  • b Serion PT IgG levels were as follows: for group 1, <30 FDA U/ml in both S1 and S2; for group 2, 30 to 80 FDA U/ml in S1 and/or S2; and for group 3, >80 FDA U/ml in S1.

  • c Also included in group 2 is the one subject with seroconversion during service (reaching 103.0 FDA U/ml in the S2 sample).

  • d Values in parentheses are 95% CIs.