Table 2: Mann-Whitney U comparison of antibody titers between age groups.
Age comparison |
≥50 |
< 50 |
≥50 Median |
< 50 Median |
Median diff |
95% CI |
p |
10 days |
|||||||
Total (BAU/mL) |
15 |
46 |
0.45 |
2.94 |
1.12 |
0 to 3.69 |
0.02* |
IgG (BAU/mL) |
15 |
46 |
6.89 |
17.8 |
11.4 |
2.72 to 37.1 |
0.01* |
IgM (COI) |
15 |
46 |
0.11 |
0.47 |
0.24 |
0.05 to 0.52 |
0.01* |
Neutralizing (ug/mL) |
15 |
46 |
0.02 |
0.05 |
0.02 |
-0.001 to 0.07 |
0.06 |
20 days |
|||||||
Total (BAU/mL) |
15 |
42 |
1632 |
2261 |
313 |
-360 to 1103 |
0.28 |
IgG (BAU/mL) |
15 |
42 |
2186 |
2515 |
300 |
-692 to 1176 |
0.51 |
IgM (COI) |
15 |
42 |
2.55 |
2.36 |
-0.26 |
-1.8 to 1.05 |
0.70 |
Neutralizing (ug/mL) |
15 |
42 |
2.71 |
3.65 |
0.69 |
-0.36 to 1.90 |
0.20 |
diff: Difference; CI: Confidence Interval; COI: Cut-Off Index
*indicates a significant difference