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. Author manuscript; available in PMC: 2021 Feb 1.
Published in final edited form as: Addict Behav. 2019 Oct 15;101:106146. doi: 10.1016/j.addbeh.2019.106146

Table 2.

Repeated-measures GLM assessing changes in progesterone.

Model 1. Effect of birth control on changes in progesterone
Within Effect F df p partial η2
Visit 1.171 1 .292 .055
Visit X birth control .327 1 .574 .016
Visit X phase transition 10.080 1 .005 .335
Visit X phase transition X birth control .856 1 .366 .041
Between Effect
Birth control .544 1 .469 .026
Phase transition .789 1 .385 .038
Birth control X phase transition .042 1 .840 .002
Model 2. Effect of last menstrual cycle > 35 days in women who transitioned from luteal to
another phase (n=12) on changes in progesterone
Within Effect F df p partial η2
Visit 4.808 1 .053 .325
Visit X > 35 day cycle .000 1 .984 .000
Between Effect
> 35 day cycle .127 1 .728 .013

Note: Phase transition refers women who transitioned to or from the luteal/ovulatory phases (high progesterone) to any other phase in their cycle. Model 2 was only conducted in women who transitioned from luteal/ovulatory phase to any other phase as no women who had cycles over 35 transitioned from any phase to the luteal/ovulatory phase.