Table 2.

Prevalence estimates (weighted) for CMV IgG low avidity by age among the 126 IgM+ sera from the NHANES national survey

Age of women (yr)No. testedMedian % positive (95% CI) by test cutoff for low aviditya
0.80.70.6
12–193667.4 (35.3–88.6)33.0 (11.6–64.9)12.3 (2.9–40.1)
20–295230.7 (16.8–49.1)16.5 (7.1–33.8)10.4 (3.8–25.6)
30–493817.1 (7.1–35.7)3.1 (0.6–14.0)3.1 (0.6–14.0)
All ages12631.1 (20.1–44.6)13.5 (6.1–27.5)7.6 (3.5–15.9)
  • a P values for trends with age were 0.004, 0.048, and 0.3 for cutoff values of 0.8, 0.7, and 0.6, respectively. 95% CI, 95% confidence intervals.