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Table 4 Age and measures of organic acids from an early morning spot urine collection of the second study population

From: Reliability of a dried urine test for comprehensive assessment of urine hormones and metabolites

Variable All Female (n = 15) Male (n = 5)
Age (years) 34.4 ± 6.6 34.5 ± 6.6 34.0 ± 7.4
Methylmalonic acid (ng/mg-Cr) 0.18 (0.16, 0.25) 0.20 (0.16, 0.29) 0.16 (0.16, 0.18)
Homovanillic acid (ng/mg-Cr)b 0.52 ± 0.16 0.57 ± 0.14 0.35 ± 0.05
Vanillylmandelic acid (ng/mg-Cr) 0.41 ± 0.12 0.43 ± 0.12 0.36 ± 0.13
Kynurenic acid (ng/mg-Cr) 0.25 ± 0.08 0.26 ± 0.08 0.21 ± 0.05
Xanthurenic acid (ng/mg-Cr) 0.06 (0.05, 0.07) 0.06 (0.04, 0.07) 0.06 (0.05, 0.07)
5-HIAA (ng/mg-Cr)a 0.44 (0.40, 0.55) 0.47 (0.41, 0.58) 0.37 (0.36, 0.41)
Pyroglutamic acid (ng/mg-Cr) 4.06 ± 0.69 4.11 ± 0.78 3.90 ± 0.33
β-Hydroxyisovaleric acid (ng/mg-Cr) 0.27 ± 0.12 0.29 ± 0.13 0.21 ± 0.07
  1. Data are presented as mean ± SD if normally distributed and median (IQR) if right-skewed
  2. ap < 0.05; bp < 0.01 for differences between males and females as assessed by the Student t-test or Wilcoxon rank-sum test
  3. 5-HIAA: 5-hydroxyindoleacetic acid