Table 2.
Factors associated with duration of neutralizing antibody.
| Persistence time M (IQR) (day) | P1 | Persistence rate at 160 days % (n/N) | Odds ratio (95%CI) | P2 | |
|---|---|---|---|---|---|
| Sex | 0.971 | ||||
| Female | 95 (88–118) | 23.8% (10/42) | 1.0 | ||
| Male | 95 (88–102) | 12.5% (2/16) | 0.416(0.066–2.609) | 0.349 | |
| Age group | 0.015 | ||||
| >31 | 95 (88–95) | 11.9% (5/42) | 1.0 | ||
| ≤31 | 95 (95–125) | 43.7% (7/16) | 6.179 (1.454–26.266) | 0.014 | |
| Anti-Spike IgA | 0.158 | ||||
| Negative | 95 (88–102) | 12.8% (5/39) | 1.0 | ||
| Positive | 95 (88–125) | 36.8% (7/19) | 4.314(1.020–18.246) | 0.047 | |
| Anti-Spike IgM | 0.662 | ||||
| Negative | 95 (88–118) | 13.0%(3/23) | 1.0 | 0.494 | |
| Positive | 95 (88–95) | 25.7%(9/35) | 1.782(0.340–9.354) |
M, medians. IQR, interquartile range.
1. The Mann-Whitney U test was constructed to assess the differences in the persistence over time.
2. A logistic regression model was used for the predictors of the persistence of neutralizing antibodies.