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Correlation between opsonophagocytic titers and antibody avidity.
| CPS | CPS + PPS22F | P value | ||
| PPS4 | Young | 0.39 | 0.44 | 0.86 |
| Elderly | 0.52 | 0.53 | 0.97 | |
| PPS14 | Young | 0.51 | 0.49 | 0.94 |
| Elderly | 0.64 | 0.59 | 0.81 |
Correlation coefficients of association (r value) between post-immunization opsonophagocytic antibody titer and antibody avidity following absorption with CPS or CPS + 22F in young and elderly volunteers. There was no significant difference between absorption techniques by Fisher's Z transformation.
