Table 2 Subjects with anti-PT IgG levels above/below the various cut-offs
Anti-PT IgG level | Total (n = 1999) | Age groups | |||
|---|---|---|---|---|---|
18–29 years (n = 408) | 30–44 years (n = 541) | 45–59 years (n = 509) | ≥60 years (n = 541) | ||
Strongly indicative of current/recent infection (≥1.5 OD units) | 2 (0.10 [0.01–0.36]) | 0 (0.00 [0.00–0.90]) | 1 (0.18 [0.00–1.03]) | 1 (0.20 [0.00–1.09]) | 0 (0.00 [0.00–0.68]) |
Indicative of current/recent infection (≥1.0 OD units) | 22 (1.10 [0.69–1.66]) | 2 (0.49 [0.06–1.76]) | 5 (0.92 [0.30–2.14]) | 4 (0.79 [0.21–2.00]) | 11 (2.03 [1.02–3.61]) |
Seropositive (>0.3 OD units) | 295 (14.76 [13.23–16.39]) | 67 (16.42 [12.96–20.38]) | 67 (12.38 [9.73–15.46]) | 56 (11.00 [8.42–14.05]) | 105 (19.41 [16.16–23.00]) |
Seronegative (≤0.3 OD units) | 1704 (85.24 [83.61–86.77]) | 341 (83.58 [79.62–87.04]) | 474 (87.62 [84.54–90.27]) | 453 (89.00 [85.95–91.58]) | 436 (80.59 [77.00–83.84]) |