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Table 1 Patient characteristics

From: Statistical learning methods as a preprocessing step for survival analysis: evaluation of concept using lung cancer data

Characteristic Incident n Incident mean/SD or % Censored n Censored mean/SD or % p-value
Age 59 69.58/7.85 92 65.42/8.84 0.0038*
Grade 59 2.22/0.62 92 2.10/0.68 0.2651*
One 6 10.17% 17 18.48% 0.1656
Two 34 57.63% 49 53.26% 0.5988
Three 19 32.20% 26 28.26% 0.6053
Gender      
Male 38 64.41% 34 36.96% 0.0010
Female 21 35.59% 58 63.04% 0.0010
Histology subtype      
Adenocarcinoma 29 49.15% 58 63.04% 0.0919
Squamous 25 42.37% 20 21.74% 0.1510
Large Cell 3 5.08% 11 11.96% 0.1555
Adenosquamous 2 3.39% 3 3.26% 0.9655
Smoking status      
Non-Smoker 12 20.34% 19 20.65% 0.9629
Smoker 47 79.66% 73 79.35% 0.9629
  1. The patient characteristics are summarized in this table. The incident column refers to group-2 patients (unfavorable survival outcome) and the censored column refers to group-1 patients (favorable survival outcome). The mean and standard deviation (SD) are provided for the continuous variables and percentages (%) are provided for the other variables by group. The number of patients (n) for each variable is given for each group. The incident and censored group characteristics were compared with either the t-test (*) or binomial proportional test. The relevant p-values are provided in the last column (right).