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. 2021 Jul 8;15(7):e0009551. doi: 10.1371/journal.pntd.0009551

Table 4. Maximum likelihood estimates of the correlation of IgG and neutralising antibody titres (nAB).

Estimates reported in a log-odds scale with 95% confidence intervals.

Study Correlation Estimate (95% Confidence intervals)
Ruetalo et al 0.727 (0.561 to 0.848)
Kohmor et al 0.589 (0.383 to 0.768)
Zettl et al 0.16 (0.01 to 0.776)
Severity (Baseline = Mixed without severe) IgG: Severe 1.094 (0.491 to 1.697)
nAB: Severe 2.363 (1.66 to 3.066)
Suthar et al 0.756 (0.589 to 0.87)
Jaaskaleinen et al 0.375 (0.155 to 0.662)
Severity (Baseline = Mild) IgG: Moderate -0.669 (-1.55 to 0.211)
IgG: Severe -0.608 (-1.545 to 0.33)
nAB: Moderate -0.897 (-1.772 to -0.022)
nABs: Severe -0.693 (-1.625 to 0.239)
Zhang et al 0.652 (0.503 to 0.776)
Severity (Baseline = Mixed without severe) IgG: Severe 0·973 (0.321 to 1.626)
nAB: Severe 1.141 (0.611 to 1.67)
Salazar et al 0.51 (0.356 to 0.661)
Severity (Baseline = Mild) IgG: Severe 1.549 (0.919 to 2.179)
nAB: Severe 1.401 (0.676 to 2.127)
Mueller et al 0.723 (0.53 to 0.858)
Severity (Baseline = Asymptomatic) IgG: Mild 1.023 (0.275 to 1.771)
nAB: Mild 2.543 (1.232 to 3.853)
Wang et al 0.597 (0.431 to 0.743)
Severity (Baseline = Mild) IgG: Severe 0.564 (0.12 to 1.008)
nAB: Severe 1.067 (0.614 to 1.521)

IgG: immunoglobulin G. nABs: neutralising antibodies.