Table 1.
Descriptive characteristics before and after propensity score matching.
| Characteristic | Participants, No. (%)a | |||||
|---|---|---|---|---|---|---|
| Before propensity score matching | After propensity score matching | |||||
| PCI (n = 81) | non-PCI (n = 225) | p-Value | PCI (n = 75) | non-PCI (n = 75) | p-Value | |
| Age | ||||||
| <65 years | 68 (84.0) | 188 (83.6) | 0.934 | 63 (84.0) | 64 (85.3) | 0.821 |
| ≥65 years | 13 (16.0) | 37 (16.4) | 12 (16.0) | 11 (14.7) | ||
| Sex | ||||||
| Female | 26 (32.1) | 74 (32.9) | 0.897 | 22 (29.3) | 16 (21.3) | 0.260 |
| Male | 55 (67.9) | 151 (67.1) | 53 (70.7) | 59 (78.7) | ||
| Smoking index | ||||||
| <400 | 42 (51.9) | 126 (56.0) | 0.520 | 37 (49.3) | 30 (40.0) | 0.250 |
| ≥400 | 39 (48.1) | 99 (44.0) | 38 (50.7) | 45 (60.0) | ||
| KPS | ||||||
| <80 | 3 (3.7) | 14 (6.2) | 0.296 | 3 (4.0) | 2 (2.7) | 0.500 |
| ≥80 | 78 (96.3) | 211 (93.8) | 72 (96.0) | 73 (97.3) | ||
| Clinical stage | ||||||
| I/II | 27 (33.3) | 46 (20.4) | 0.015 | 23 (30.7) | 25 (33.3) | 0.726 |
| III | 54 (66.7) | 179 (79.6) | 52 (69.3) | 50 (66.7) | ||
| Obstructive pneumonia | ||||||
| Yes | 23 (28.4) | 73 (32.4) | 0.501 | 22 (29.3) | 24 (32.0) | 0.723 |
| No | 58 (71.6) | 152 (67.6) | 53 (70.7) | 51 (68.0) | ||
| Initial treatment | ||||||
| Concurrent CRT | 38 (46.9) | 52 (23.1) | 0.001 | 35 (46.7) | 29 (38.7) | 0.322 |
| Sequential CRT | 43 (53.1) | 173 (76.9) | 40 (53.3) | 46 (61.3) | ||
| Response to initial treatment | ||||||
| CR | 19 (23.5) | 19 (8.4) | 0.001 | 16 (21.3) | 8 (10.7) | 0.075 |
| PR/SD | 62 (76.5) | 206 (91.6) | 59 (78.7) | 67 (89.3) | ||
PCI, prophylactic cranial irradiation; KPS, Karnofsky Performance Status; CRT, chemoradiotherapy; CR, complete response; PR, partial response; SD, stable disease.
The bold values inidicate p-value is less than 0.05.