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Table 4 DDC mRNA expression a analysis in subgroups of LSCC 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 8 40.95 ± 25.88 0.41 0.033c
  > 2 cm 11 0.42 ± 0.37 0.05  
TNM stage
  I 5 63.94 ± 39.01 0.52 0.027d
  II 3 2.65 ± 2.61 0.05  
  III 11 0.42 ± 0.37 0.05  
Histological grade
  I 7 0.12 ± 0.07 0.05 0.46d
  II 6 28.22 ± 27.35 0.05  
  III 6 27.03 ± 25.40 0.17  
  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.