Table 2 Characteristics of the stage I lung cancer patients.
From: Uncovering interpretable potential confounders in electronic medical records
| Â | Treatment groups | |
|---|---|---|
Features | Surgery (n = 484) | Radiation (n = 224) |
Age, mean (std) | 68.05 (10.7) | 74.60 (9.1) |
Gender, no. (%) | Â | Â |
 Female | 299 (62.0%) | 87 (41.2%) |
 Male | 185 (38.0%) | 137 (58.8%) |
Race, no. (%) | Â | Â |
 White | 293 (60.8%) | 152 (66.5%) |
 Black | 12 (2.2%) | 5 (3.5%) |
 Asian and Pacific islander | 99 (20.1%) | 18 (9.7%) |
 Unknown | 80 (16.9%) | 49 (20.2%) |
Ethnicity, no. (%) | Â | Â |
 Hispanic | 23 (4.9%) | 10 (3.9%) |
 Non-hispanic | 411 (84.3%) | 178 (81.7%) |
 Unknown | 50 (10.8%) | 36 (14.4%) |
No. notes/patient, mean (std) | 57.49 (101.2) | 57.73 (134.9) |
Days of survival, mean (std) | 2060.13 (1,207.5) | 1350.29 (914.1) |
Death, no. (%) | 120 (24.8%) | 126 (53.3%) |
