Reference | Population | CD probands, n | CD siblings, n | Total siblings, n | CD risk, % | Sibling relative risk* |
Kuster et al (1989)4 | Germany | 265 | 13 | 453 | 2.87 | 28.7 |
Probert et al (1993)6 | UK | 424 | 19 | 984 | 1.93 | 19.3 |
Peeters et al (1996)7 | Belgium | 640 | 57 | 1728 | 3.3 | 33.0 |
Satsangi et al (1994)8 | UK | 433 | 20 | 782 | 2.56 | 25.6 |
Total | 2003 | |||||
Average risk | 2.67 | 26.7 | ||||
Average, weighted by study size | 2.72 | 27.2 |
*Using a population prevalence of 0.001 for all studies.
Estimates of sibling relative risk for each study, mean value across studies, and a mean value weighting by study size (number of probands) are given.