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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Fertil Steril. 2016 Jan 25;105(5):1294–1300. doi: 10.1016/j.fertnstert.2016.01.015

Table 2.

Cycle-specific fecundability ratios (FR)* for patients with intermenstrual bleeding

Unadjusted FR (95% CI) Adjusted FR1 (95% CI) Adjusted FR2 (95% CI)
Current cycle fecundability
 Intermenstrual bleeding 0.22 (0.15-0.32) 0.23 (0.16-0.34)
 Luteal bleeding 0.21 (0.14-0.31) 0.22 (0.14-0.33)
Subsequent cycle fecundability
 Intermenstrual bleeding 1.20 (0.91-1.58) 1.25 (0.94-1.66) 1.61 (1.15-2.25)
 Luteal bleeding 1.36 (1.04-1.77) 1.46 (1.11-1.91) 2.01 (1.52-2.87)
*

Based on a Cox proportional hazards model

1

Model 1: adjusted for age, race, education level, gravidity, smoking, BMI, and mean cycle length with absence of bleeding as the reference group.

2

Model 2: adjusted for bleeding in the outcome cycle in addition to all variables adjusted for in model 1, with absence of bleeding as the reference group.