Table 3—

Gene-by-obesity interaction of arginine (Arg) 64 variant of β₃-adrenergic receptor gene in patients with obstructive sleep apnoea syndrome (OSAS) and controls

	Nonobese				Obese
	OSAS	Controls	RR (95% CI)	p-value	OSAS	Controls	RR (95% CI)	p-value
Subjects n	155	88			231	49
Arg⁶⁴ carriers n	17	14	0.65 (0.30–1.39)	0.318	54	7	1.83 (0.78–4.30)	0.186
Noncarriers n	138	74			177	42

RR: relative risk; CI: confidence interval.