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Table 5 DDC mRNA expression a analysis in subgroups of TSCC patients, classified according to classical clinicopathological parameters

From: L-DOPA decarboxylase mRNA expression is associated with tumor stage and size in head and neck squamous cell carcinoma: a retrospective cohort study

Variable No. of patients Mean ± SEb Median p value
Tumor size
  ≤ 2 cm 7 13.76 ± 3.36 0.26 0.028c
  > 2 cm 6 5.08 ± 0.02 0.05  
TNM stage
  I 3 31.73 ± 3.11 1.00 0.025d
  II 7 0.18 ± 0.13 0.05  
  III 3 0.05 ± 0.003 0.05  
Histological grade
  I 5 0.24 ± 0.19 0.05 0.097d
  II 4 0.28 ± 0.23 0.05  
  III 3 31.34 ± 31.29 0.05  
  1. a a.u.: arbitrary units.
  2. b Standard error of the mean.
  3. c Calculated using the Mann-Whitney U test.
  4. d Calculated using the Kruskal-Wallis test.