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Table 1 Characteristics of both patient collectives – conditioning phase and study phase

From: Sniffer dogs can identify lung cancer patients from breath and urine samples

  Conditioning Phase (n = 186) Study Phase (n = 246)
Collective Cancer Control Cancer Control
Total number of patients (n) 36 150 41 205
Gender (female/male) 17 / 19 74 / 76 12 / 29 85 / 120
47.2% / 52.7% 49.3% / 50.6% 29.3% / 70.7% 41.5% / 58.5%
Age in years (mean) 66.72 62.91 65,63 61.71
Smoker / Non-smoker 17 / 19 38 / 112 22 / 19 59 / 146
47.2% / 52.7% 25.3% / 74.7% 53.7% / 46.3% 28.8% / 71.2%
Renal infection (yes / no) 1 / 35 7 / 143 1 / 40 4 / 201
2.8% / 97.2% 4.7% / 95.3% 2.4% / 97.6% 2.0% / 98.0%
Regular use of alcohol (yes / no) 6 / 30 15 / 135 6 / 35 28 / 177
16.7% / 83.3% 10.0% / 90.0% 14.6% / 85.4% 13.7% / 86.3%
Tumor entities SCLC 8 22.2%   10 24.4%  
Squamous epithelial cell cancer 11   30.6% 12 29.3%
Adenocarcinoma 17 47.2% 18 43.9%
Large-cell lung cancer 0 1 2.4%
UICC-Stage Stage I 3 8.3%   2 4.9%  
  Stage II 6 16.7% 6 14.6%
  Stage III 13 36.1% 11 26.8%
  Stage IV 14 38.9% 22 53.7%