Table 1 Estimated RRs for first-, second-, and third-degree relatives in the 811 CFS cases
From: Evidence for a heritable predisposition to Chronic Fatigue Syndrome
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 |