Figure 3.

Levothyroxine treatment effect on Hb levels after 12 months of treatment. Boxplots represent the median, interquartile range, minimum, and maximum in Hb levels. Treatment effect −0.03 g/dL (95% CI, −0.16 to 0.11). Treatment effect (95% CI) was calculated using linear mixed effect regression models adjusting for study site, study, treatment dose at randomization, age, and sex and represents the additional change in hemoglobin level after 12 months of treatment with levothyroxine, compared with placebo.