Table 2 Baseline characteristics of two groups in immunologic response
Characteristics | Treatment group | Control group | P value |
|---|---|---|---|
Number | 21 | 20 | Â |
Age (years) | Â | Â | Â |
 Mean (Range) | 56.6 (32–74) | 54.3 (39–68) | 0.48 |
Gender | Â | Â | Â |
 Male | 19 (90.5 %) | 17 (85 %) |  |
 Female | 2 (9.5 %) | 3 (15 %) | 0.66 |
Clinical stage | Â | Â | Â |
 III | 10 (47.6 %) | 10 (50 %) |  |
 IV | 11 (52.4 %) | 10 (50 %) | 0.88 |
Tumor histology | Â | Â | Â |
 Adenocarcinoma | 8 (38.1 %) | 10 (50 %) |  |
 Squamous carcinoma | 13 (61.9 %) | 10 (50 %) | 0.44 |
Cycles of previous chemotherapy | 2.9 ± 0.7 | 2.4 ± 0.5 | 0.06 |
PS score | 0.4 ± 0.6 | 0.5 ± 0.6 | 0.91 |