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Table 1 Patient characteristics

From: Clonal relationship of synchronous head and neck cancer and esophageal cancer assessed by single nucleotide polymorphism-based loss of heterozygosity analysis

 No. (%)
Number21
Age
 mean (years)58.7
  < 6515 (71.4)
  ≥ 656 (28.6)
Gender
 Male20 (95.2)
 Female1 (4.8)
Smoking
 Never1 (4.8)
 Formera5 (23.8)
 Active9 (42.9)
 Unknown6 (28.6)
Alcohol consumption
 Never0 (0)
 Formera3 (14.3)
 Active12 (57.1)
 Unknown6 (28.6)
Site of HNSCC
 Oropharynx4 (19.0)
 Hypopharynx10 (47.6)
 Larynx7 (33.3)
Stagingb of HNSCC
 I4 (19.0)
 II2 (9.5)
 III6 (28.6)
 IV9 (42.9)
Site of ESCC
 upper0 (0)
 middle15 (71.4)
 lower6 (28.6)
Stagingb of ESCC
 I1 (4.8)
 II15 (71.4)
 III5 (23.8)
 IV0 (0)
  1. HNSCC, head and neck squamous cell carcinoma; ESCC, esophageal squamous cell carcinoma; aQuit smoking or alcohol consumption at least 1 year before this study began; bAmerican Joint Committee on Cancer (AJCC) stage (7th ed)