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Table 4 Correlation between BDNF, HDRS, BSS, and other variables in the MDD group

From: Serum BDNF and suicidal ideation in drug-naïve and drug-treated MDD patients: a case–control study

Variables

BDNF

HDRS

BSS

r

P

r

P

r

P

Age

0.27

0.04(S)

−0.48

˂0.001(HS)

−0.08

0.6

Education level

−0.16

0.2

0.31

0.02(S)

−0.15

0.3

Age of onset

−0.27

0.04(S)

−0.06

0.7

−0.05

0.7

Disease duration

0.27

0.04(S)

−0.34

0.01(S)

−0.02

0.9

Duration of current episode

0.27

0.04(S)

−0.19

0.2

−0.14

0.3

Number of previous episodes

0.32

0.01(S)

0.03

0.8

0.10

0.5

  1. BDNF serum level of brain-derived neurotrophic factor, HDRS Hamilton Depression Rating Scale, BSS Beck Scale for Suicidal Ideation, S significant, HS highly significant