Table 5.

Results for the matched case-control study (1:5)

	All*	Age≤45 years†	Age>45 years‡
ORs for IBS in adoptees with an affected biological parent	1.67 (1.06 to 2.62)	1.70 (0.93 to 3.08)	1.63 (0.82 to 3.25)
ORs for IBS in adoptees with an affected adoptive parent	0.88 (0.48 to 1.63)	1.03 (0.48 to 2.21)	0.69 (0.24 to 1.96)

ORs for IBS among adoptees with an affected biological or adoptive parent. Age-stratified ORs for IBS are also shown. Data are presented as OR (95% CI).

*Cases (n=569) and controls (n=2 845).

†Cases (n=315) and controls (n=1 575).

‡Cases (n=254) and controls (n=1 270).

IBS, irritable bowel syndrome.