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Table 3 Association of B19 IgM and PCR positivity among cases (having severe anaemia Hb ≤ 50 g/l) as compared to controls.

From: Parvovirus B19 infection and severe anaemia in Kenyan children: a retrospective case control study

   IgM IgM > 5 × COV PCR IgM+PCR*
   Controls   Controls   Controls   Controls  
   + - + - + - + -
Cases
(Hb ≤ 50 g/l)
+ 0 10 0 7 0 6 0 3
  - 5 249 0 257 5 187 1 194
Exact Odds Ratio   2.00
CI95 [0.62, 6.06]
+ Inf
CI95 [1.65, +Inf]
1.2
CI95 [0.33, 4.01]
3.00
CI95 [0.33, 77.48]
Exact McNemar test 2-sided p   p = 0.3018 p = 0.01563 p = 1 p = 0.625
  1. Numbers refer to matched case-control control pairs.
  2. * only double positive sample scored as positive.