Table 1 Patient characteristics
|  | All (n = 124) | PCI (n = 29) | non-PCI (n = 95) | P |
|---|---|---|---|---|
Age, year (range) | 72 (37–88) | 65 (37–74) | 74 (37–88) | <0.0001 |
Male | 113 (91) | 27 (93) | 86 (90) | 0.778 |
Smoking status | Â | Â | Â | 0.721 |
 Current | 61 (49) | 15 (52) | 46 (48) |  |
 Former | 60 (48) | 14 (48) | 46 (48) |  |
 Never | 2 (2) | 0 | 2 (2) |  |
 Unknown | 1 (1) | 0 | 1 (1) |  |
Number of packets | 46 (0–210) | 60 (12–140) | 45 (0–210) | 0.226 |
Clinical stage | Â | Â | Â | 0.0009 |
 Stage I/II | 51 (41) | 5 (17) | 46 (49) |  |
 Stage III | 73 (59) | 24 (83) | 49 (52) |  |
ECOG PS | Â | Â | Â | 0.337 |
 0 | 70 (56) | 20 (69) | 50 (53) |  |
 1 | 50 (40) | 8 (28) | 42 (44) |  |
 2 | 4 (3) | 1 (3) | 3 (3) |  |
Initial treatment | Â | Â | Â | 0.094 |
Chemoradiotherapy | 61 (49) | 19 (66) | 42 (44) | Â |
 Radiotherapy | 4 (3) | 0 (0) | 4 (4) |  |
 Surgery | 41 (34) | 8 (28) | 33 (35) |  |
 Chemotherapy | 18 (15) | 2 (7) | 16 (17) |  |
Response to initial treatment | Â | Â | Â | 0.0052 |
 Complete response | 82 (66) | 25 (86) | 57 (60) |  |
 Good partial response | 42 (34) | 4 (14) | 38 (40) |  |
Cranial MRI before PCI | 85 (69) | 28 (97) | 57 (60) | <0.0001 |
Observation period (month) | 20 (6–94) | 20 (6–82) | 20 (6–94) | 0.945 |