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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.