OC use*	Smoking	Ca/Co	OR (95% CI)†	OR (95% CI)‡
Ever	None	113/449	1.0	1.0
Never	None	60/215	1.24 (0.86 to 1.77)	1.26 (0.87 to 1.83)
Ever	Any	657/531	4.99 (3.93 to 6.33)	5.11 (4.00 to 6.54)
Never	Any	348/243	6.62 (5.03 to 8.70)	6.28 (4.73 to 8.34)
AP§			0.21 (0.04 to 0.38)	0.14 (-0.05 to 0.34)