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Table 7 Correlation between opsonophagocytic titers and antibody avidity.

From: Immune response to pneumococcal polysaccharides 4 and 14 in elderly and young adults. I Antibody concentrations, avidity and functional activity

   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
  1. 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.