39 Duration of the fertility enhancing effect of HSG with oil-based contrast 2 Supplementary Figure 4. Scaled Schoenfeld residuals plot for the basic Cox model using log-transformed time in a subgroup of women who experienced pain (visual analogue scale of 6 points or more) during HSG. Log hazard ratio for ongoing pregnancy estimated over three years follow-up of oil-based versus waterbased contrast shown by Scaled Schoenfeld residuals plot for the basic Cox model using log-transformed time in a subgroup of women who experienced pain during HSG. Dotted lines represent the 95% confidence interval. Test for non-proportional hazards over time: p=0.71.
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