Which lab tests are performed in the workup of persistent depressive disorder (dysthymia)?

[zareen]

Which lab tests are performed in the workup of persistent depressive disorder (dysthymia)?

[Ronn James]

@sarkarsatarupa The following lab tests may be carried out in the evaluation of patients with dysthymia:

Complete blood count (CBC) with a sedimentation rate

Thyroid function tests

Homocysteine and methylmalonic acid levels - These may be better for detecting folate/vitamin B-12–responsive dysthymia than would folate and vitamin B-12 levels themselves