Table 1. Characteristics of women included in the mendelian randomization study.

Variables	OSAS				BC
	Cases (n=900)	Controls (n=1078)	P value		Cases (n=1200)	Controls (n=1200)	P value
Age
≥50	462 (51.3%)	564 (52.3%)	0.662		685 (57.1%)	641 (53.4%)	0.071
<50	438 (48.7%)	514 (47.7%)			515 (42.9%)	559 (36.6%)
Body mass index (BMI)	23.97±3.21	23.88±3.17	0.532		23.96±3.20	23.90±3.24	0.648
Family history of cancer
Yes	113 (12.6%)	108 (10.0%)	0.074		289 (24.1%)	122 (10.2%)	<0.001
No	787 (87.4%)	970 (90.0%)			911 (75.9%)	1078 (89.8%)
Smoking status
Smokers	160 (17.8%)	162 (15.0%)	0.099		215 (17.9%)	184 (15.3%)	0.089
Non-Smokers	740 (82.2%)	916 (85.0%)			985 (82.1%)	1016 (84.7%)
OSAS
Yes	-	-			289 (24.1%)	122 (10.2%)	<0.001
No	-	-			911 (75.9%)	1078 (89.8%)