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. 2011 Nov;18(11):1895–1899. doi: 10.1128/CVI.05228-11

Table 4.

Association between CMV IgM antibody level and low IgG aviditya

IgM UA/ml No. of sera (total = 324) % low avidity
IgM negative or equivalent, <0.90 154 1.9
0.90–1.09 50 6.0
1.10–1.29 26 15.4
1.30–1.49 29 17.2
1.50–1.99 32 40.6
≥2.00–4.00 33 78.8
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.