Table 6.

Subanalysis Including Only Women Who Had Used Hormonal Contraception for 12 Months or Longer: Duration Variable Results from 3-Level Generalized Multilevel Models

Duration variable (time-varying)	B	SE	p	AOR	AOR 95% C.I.
No use	−1.40	0.15	<0.001	0.25	(0.183,0.330)
<1 month (reference)	-	-	-	1.00	-
1 to <3 months	−0.01	0.14	0.961	0.99	(0.757,1.303)
3 to <6 months	−0.21	0.14	0.130	0.81	(0.621,1.063)
6 to <9 months	−0.03	0.15	0.818	0.97	(0.727,1.286)
9 to <12 months	−0.12	0.15	0.441	0.89	(0.665,1.195)
12 to <18 months	−0.15	0.15	0.291	0.86	(0.643,1.142)
18+ months	−0.36	0.16	0.027	0.70	(0.507,0.959)

Note. B = Unstandardized coefficients. C.I. = Confidence interval. SE = Standard error. AOR = Adjusted odds ratio. Full results available in supplemental materials. N = 8,339 weeks among 150 women.