Skip to main content

Table 2 Ct values in genogroup II norovirus positive IID cases and healthy controls.

From: Diagnosing norovirus-associated infectious intestinal disease using viral load

Method of norovirus detection

IID Cases

Controls

Rank-sum test p-value

comparing cases to controls

 

Median Ct

value

Ct value

IQR

Sample

size

Median Ct

value

Ct value

IQR

Sample

size

 

All ages

       

   All

34

25–37

589

38

35–39

159

<0.0001

   Electron microscopy

24

21–27.5

92

   

<0.0001

RT-PCR

(Electron microscopy negative)

35

29–38

497

   

<0.0001

< 5 years

       

   All

34

26–37

253

37

34–38

92

<0.0001

   Electron microscopy

23

21–25

48

   

<0.0001

RT-PCR

(Electron microscopy negative)

35

32–37

205

   

0.0001

5 years +

       

   All

34

25–38

334

38

36–39

67

<0.0001

   Electron microscopy

25

22–28.5

44

   

<0.0001

RT-PCR

(Electron microscopy negative)

35

27–38

290

   

<0.0001

  1. The rank-sum tests for electron microscopy and RT-PCR positive IID cases compare them to all controls. Age was not recorded for two IID cases. IQR is the interquartile range.