Table 4.

Association between CMV IgM antibody level and low IgG aviditya

IgM UA/mlNo. of sera (total = 324)% low avidity
IgM negative or equivalent, <0.901541.9
0.90–1.09506.0
1.10–1.292615.4
1.30–1.492917.2
1.50–1.993240.6
≥2.00–4.003378.8
  • a Sera are listed by increasing levels of IgM antibody, showing the proportion that were low IgG avidity. Chi-square test for trend, P < 0.0001. The 0.7 avidity test cutoff was used to define low IgG avidity.