Fig. 2.
a Forest plots of studies comparing the number of depression patients between SCH and euthyroid individuals. The rhombus represents the OR and 95% CI obtained for the combined calculation. b Subgroup analyses of depression based on age in a random effects model. The rhombus represents the OR and 95% CI obtained for the combined calculation. Younger: participants with the mean age <60 years old. Older: participants with the mean or minimum age ≥60 years old