Table 3.

Risk for BPS symptoms in relation to smoking, coffee, and tea consumption among female twins born 1959–1985.

	Crude OR (95% CI)	Adjusted† OR (95% CI)
BPS
N	9 304	9 089
Cups of coffee/day
0	1.0	1.0
1–2	0.99 (0.77–1.27)	1.04 (0.80–1.35)
3+	1.15 (0.91–1.44)	1.1 (0.84–1.45)
Cups of tea/day
0	1.0	1.0
1–2	1.13 (0.93–1.37)	1.26 (1.02–1.55)
3+	1.56 (1.14–2.13)	1.74 (1.24–2.44)
Smoking
Never	1.0	1.0
Former	1.55 (1.23–1.94)	1.50 (1.18–1.89)
Current	1.62 (1.29–2.03)	1.49 (1.16–1.92)

^†Adjusted for age, parity, BMI, and educational level.