Table 3 Comparison of sociodemographic and laboratory variables among first-episode MDD, recurrent MDD and healthy controls

Age (year)

41.10 ± 0.268^a

49.46 ± 0.260^ab

42.82 ± 0.157

Sex (male/female)

1868/2933^a

1325/2773^ab

2863/3984

Platelet

240.401 ± 0.907^a

238.795 ± 0.978^a

252.994 ± 0.712

MPV

9.398 ± 0.015^a

9.386 ± 0.016^a

8.699 ± 0.014

PDW

13.748 ± 0.034^a

13.784 ± 0.037^a

15.931 ± 0.019

PCT

0.209 ± 0.001^a

0.207 ± 0.001^a

0.218 ± 0.001

Neutrophil

3.337 ± 0.020^a

3.401 ± 0.022^ab

3.597 ± 0.014

Lymphocyte

1.881 ± 0.009^a

1.833 ± 0.009^a

1.963 ± 0.007

RDW

13.696 ± 0.024^a

13.684 ± 0.026^a

13.272 ± 0.014

Albumin

43.313 ± 0.052^a

42.999 ± 0.057^ab

45.999 ± 0.033

PLR

139.374 ± 0.820^a

142.034 ± 0.901^a

136.981 ± 0.545

SII

474.870 ± 5.490^a

490.509 ± 5.657

492.205 ± 2.910

RPR

0.061 ± 0.000^a

0.062 ± 0.000^a

0.056 ± 0.000

PAR

5.579 ± 0.022

5.579 ± 0.024

5.520 ± 0.016