The relation between thyroid function and anemia: a pooled analysis of individual participant data. Daisy M Wopereis et al. 

Higher odds of having anemia were observed in both participants with hypothyroid function and hyperthyroid function. In addition, reduced thyroid function at baseline showed a trend of increased risk of developing anemia during follow-up. 

Low thyroid function is not associated with an accelerated deterioration in renal function. Christiaan L Meuwese et al.