Skip to main content

Table 2 Unadjusted Spearman’s correlations

From: Serum concentrations of kynurenines in adult patients with attention-deficit hyperactivity disorder (ADHD): a case–control study

 

Trp

Kyn

KTR

HK

KA

XA

AA

HAA

QA

Vit. B2

Vit. B6

Cot

ADHD status

All (N = 264)

 Age

−0.24*

−0.05

0.13*

−0.13*

−0.13*

−0.26*

0.09

−0.27*

−0.10

−0.04

−0.23*

0.26*

0.47*

 Sex

0.19*

0.18*

0.01

−0.11

0.21*

0.01

0.08

−0.04

−0.03

−0.14*

0.11

0.15*

0.04

 Trp

 

0.49*

−0.46*

0.14*

0.34*

0.41*

0.10

0.34*

0.18*

0.17*

0.32*

−0.13*

−0.18*

 Kyn

  

0.48*

0.39*

0.48*

0.24*

0.36*

0.32*

0.58*

0.16*

0.19*

−0.04

−0.09

 Vit. B2

  

−0.06

0.02

0.15*

0.23*

0.11

0.15*

0.27*

 

0.32*

−0.13*

−0.14*

 Vit. B6

  

−0.12

−0.12

0.22*

0.20*

0.03

0.24*

0.19*

  

−0.16*

−0.12*

 Cotinine

  

0.05

−0.06

−0.08

−0.16*

0.02

−0.20*

−0.03

   

0.52*

ADHD (N = 133)

 Age

−0.30*

−0.08

0.22*

−0.26*

−0.11

−0.31*

0.05

−0.27*

−0.08

0.22*

−0.16

−0.04

 

 Sex

0.15

0.14

0.03

−0.04

0.08

0.03

−0.02

0.09

−0.00

−0.18*

0.09

0.13

 

 Trp

 

0.55*

−0.41*

0.21*

0.34*

0.48*

0.01

0.35*

0.32*

0.18*

0.40*

−0.07

 

 Kyn

  

0.46*

0.45*

0.50*

0.29*

0.32*

0.39*

0.64*

0.17

0.21*

0.07

 

 Vit. B2

  

−0.03

−0.01

0.15

0.29*

0.10

0.15

0.30*

 

0.32*

−0.13

 

 Vit. B6

  

−0.17

−0.01

0.28*

0.26*

−0.03

0.28*

0.24*

  

−0.27*

 

 Cotinine

  

0.08

0.03

−0.11

−0.19*

−0.03

−0.08

−0.01

    

Control (N = 131)

 Age

0.10

0.10

−0.01

0.05

0.01

−0.03

0.10

−0.06

−0.10

−0.19*

−0.24*

0.14

 

 Sex

0.28*

0.25*

−0.03

−0.19*

0.36*

−0.01

0.20*

−0.11

−0.08

−0.06

0.16

0.20*

 

 Trp

 

0.41*

−0.48*

0.04

0.31*

0.27*

0.24*

0.19*

−0.02

0.13

0.21*

0.06

 

 Kyn

  

0.55*

0.31*

0.46*

0.17

0.42*

0.16

0.50*

0.10

0.13

0.05

 

 Vit. B2

  

−0.10

0.03

0.09

0.12

0.13

0.03

0.21*

 

0.33*

0.06

 

 Vit. B6

  

−0.06

−0.26*

0.14

0.11

0.12

0.14

0.11

  

0.14

 

 Cotinine

  

−0.02

−0.11

0.17

0.03

0.09

−0.10

−0.03

    
  1. Significance: <0.05 ‘*’
  2. Trp tryptophan, Kyn kynurenine, KTR kynurenine/tryptophan ratio, HK 3-hydroxykynurenine, KA kynurenic acid, XA xanthurenic acid, AA anthranilic acid, HAA 3-hydroxyanthranilic acid, QA quinolinic acid, Cot cotinine