Table 2.
Clinicopathologic Characteristics of Patients After the Covariate Balancing Propensity Score Weighting.
| Characteristic | No. of patients (%) | SMD | |
|---|---|---|---|
| Non-surgery group (N = 32538) | Surgery group (N = 1074) | ||
| Year of diagnosis | 0.067 | ||
| 2010 | 4925 (15.1) | 166 (15.5) | |
| 2011 | 4785 (14.7) | 163 (15.1) | |
| 2012 | 5331 (16.4) | 159 (14.8) | |
| 2013 | 5688 (17.5) | 184 (17.2) | |
| 2014 | 5839 (17.9) | 183 (17) | |
| 2015 | 5971 (18.3) | 219 (20.4) | |
| Sex | 0.046 | ||
| Male | 17946 (55.2) | 568 (52.9) | |
| Female | 14592 (44.8) | 506 (47.1) | |
| Age, years | 0.068 | ||
| 18-49 | 2156 (6.6) | 75 (7.0) | |
| 50-54 | 2948 (9.1) | 87 (8.1) | |
| 55-59 | 4435 (13.6) | 151 (14.1) | |
| 60-64 | 5209 (16.0) | 161 (15.0) | |
| 65-69 | 5676 (17.4) | 189 (17.6) | |
| 70-74 | 4826 (14.8) | 179 (16.7) | |
| 75-79 | 3738 (11.5) | 119 (11.1) | |
| 80+ | 3550 (10.9) | 112 (10.4) | |
| Race | 0.044 | ||
| White | 25039 (77.0) | 808 (75.2) | |
| Black | 4331 (13.3) | 158 (14.7) | |
| Othera | 3168 (9.7) | 108 (10.1) | |
| Marital | 0.021 | ||
| Single | 5462 (16.8) | 172 (16) | |
| Married | 17837 (54.8) | 596 (55.5) | |
| Otherb | 9239 (28.4) | 306 (28.5) | |
| Site | 0.064 | ||
| Lower lobe, lung | 8558 (26.3) | 273 (25.4) | |
| Lung, NOS | 3115 (9.6) | 107 (10.0) | |
| Main bronchus | 1538 (4.7) | 65 (6.1) | |
| Middle lobe, lung | 1357 (4.2) | 45 (4.2) | |
| Overlapping lesion of lung | 319 (1.0) | 10 (1.0) | |
| Upper lobe, lung | 17651 (54.2) | 573 (53.3) | |
| Grade | 0.047 | ||
| Ⅰ | 1650 (5.1) | 59 (5.5) | |
| Ⅱ | 9690 (29.8) | 300 (27.9) | |
| Ⅲ | 20448 (62.8) | 693 (64.5) | |
| Ⅳ | 750 (2.3) | 23 (2.1) | |
| Histology | 0.045 | ||
| Adenocarcinoma | 23916 (73.5) | 773 (71.9) | |
| Squamous cell carcinoma | 7101 (21.8) | 253 (23.6) | |
| Larger cell carcinoma | 923 (2.8) | 31 (2.9) | |
| Adenosquamous carcinoma | 598 (1.8) | 17 (1.6) | |
| T stage | 0.042 | ||
| T1 | 4062 (12.5) | 126 (11.7) | |
| T2 | 9245 (28.4) | 291 (27.1) | |
| T3 | 8555 (26.3) | 289 (27) | |
| T4 | 10676 (32.8) | 367 (34.2) | |
| N stage | 0.059 | ||
| N0 | 6992 (21.5) | 209 (19.4) | |
| N1 | 2670 (8.2) | 89 (8.3) | |
| N2 | 15111 (46.4) | 500 (46.6) | |
| N3 | 7765 (23.9) | 277 (25.8) | |
| Radiation therapy | 0.023 | ||
| No | 13596 (41.8) | 461 (42.9) | |
| Yes | 18942 (58.2) | 613 (57.1) | |
| Chemotherapy | 0.012 | ||
| No | 11708 (36.0) | 375 (35.4) | |
| Yes | 20830 (64.0) | 694 (64.6) | |
| Distant metastatic site | |||
| Distant lymph nodes | 0.005 | ||
| No | 26672 (82.0) | 878 (81.8) | |
| Yes | 5866 (18.0) | 196 (18.2) | |
| Bone | 0.023 | ||
| No | 15573 (47.9) | 502 (46.7) | |
| Yes | 16965 (52.1) | 572 (53.3) | |
| Brain | 0.043 | ||
| No | 20639 (63.4) | 703 (65.5) | |
| Yes | 11899 (36.6) | 371 (34.5) | |
| Liver | 0.011 | ||
| No | 25552 (78.5) | 848 (79.0) | |
| Yes | 6986 (21.5) | 226 (21.0) | |
Abbreviation: SMD, standard mean difference.
a American Indian/AK Native, Asian/Pacific Islander.
b Widowed/Divorced/Separated/Unmarried or Domestic Partner.