Table 1

Estimated RRs for first-, second-, and third-degree relatives in the 811 CFS cases

Degree

relative

Relatives of:

cases / controls

# CFS cases in

relatives of:

Cases / controls

p-value

RR

95% CI


first

5,573 / 28,965

19 / 37

0.001

2.70

1.56, 4.66

second

15,469 / 80,206

16 / 36

0.008

2.34

1.32, 4.19

third

39,766 / 201,717

24 / 64

0.009

1.93

1.21, 3.07


Albright et al. BMC Neurology 2011 11:62   doi:10.1186/1471-2377-11-62

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