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. 2023 Jan 24;12:e80428. doi: 10.7554/eLife.80428

Figure 3. Associations with low relative anti-Spike antibody levels within TwinsUK and Avon Longitudinal Study of Parents and Children (ALSPAC).

Odds ratios with unadjusted 95% confidence intervals for selected exposure variables, testing associations with low anti-Spike antibody levels, for sub-samples of TwinsUK (purple circles) and ALSPAC (red diamonds) individuals tested in Q2 or Q4, while single-, double-, or triple- vaccinated. Low antibody levels were defined as the lowest 10% within the given sub-sample, except for ALSPAC and TwinsUK Q2 double-vaccinated sub-samples where lowest 8% is used due to assay upper limit. Each point estimate originates from a distinct multivariate logistic regression model, including the exposure variable of interest and adjustment variables of age, sex, name of most recent vaccine received and weeks since most recent vaccination. Note x-axis ranges on sub-plots vary, and vaccine received panel uses a logarithmic x-axis. Odds ratio = 1 is indicated with a dashed black line.

Figure 3.

Figure 3—figure supplement 1. Antibody level differences after third vaccination between related twins and non-related pairs.

Figure 3—figure supplement 1.

Empirical cumulative distribution functions describing the difference in anti-Spike antibody levels after third severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination within TwinsUK, with pair differences calculated between all complete pairs of related monozygotic (MZ) twins, dizygotic (DZ) twins, and all combinations of non-related pairs.