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Table 1 Baseline demographic, clinical characteristics and the corresponding EGFR gene mutation ratio

From: Epidermal growth factor receptor gene mutation status in pure squamous-cell lung cancer in Chinese patients

  Positive Mutation type Negative Total Mutation ratio Pvalue
19del 21L858R
17 12
Sex        0.022
Male 14 12 2 100 114 12.3%
Female 14 5 10 35 49 28.6%
Degree of differentiation 0.651
Well 10 6 4 49 59 16.7%
Moderately 8 2 6 48 56 14.3%
Poorly 10 9 2 38 48 20.8%
Age       0.730
30-49 years 2 2 0 9 11 26.2%
50-69 years 23 13 11 100 123 11.5%
≥70 years 3 2 1 26 29 12.5%
Smoking status       0.049
Non-smoking 16 10 6 45 61 26.2%
Smoking 9 5 5 69 78 11.5%
Unknown 3 2 1 21 24 12.5%