Table 1.
Patient characteristics (N = 2,351)
| Patient characteristics | White n (%) | AA n (%) | P-value† |
|---|---|---|---|
| Overall | 1,634 (70) | 717 (31) | - |
| Age (years) | |||
| Mean ± SD, Median (IQR) | 67 ± 10, 68 (14) | 64 ± 10, 64 (14) | <0.0001 |
| Sex | |||
| Male | 981 (60) | 491 (68) | <0.0001 |
| Female | 653 (40) | 226 (32) | |
| Histology | |||
| Higher smoking risk | 718 (44) | 260 (36) | 0.0005 |
| SCC | 514 (31) | 207 (29) | |
| SCLC | 204 (12) | 53 (7) | |
| Lower smoking risk | 916 (56) | 457 (64) | |
| Adenocarcinoma | 461 (28) | 236 (33) | |
| LCNEC | 54 (3) | 21 (3) | |
| Bronchoalveolar | 32 (2) | 13 (2) | |
| NSCLC NOS | 324 (20) | 177 (25) | |
| Other | 45 (3) | 10 (1) | |
| Tobacco use§‡′ | |||
| Never | 139 (9) | 58 (8) | 0.81 |
| Ever | 1,495 (91) | 659 (92) | |
| Surgery | |||
| No | 1,066 (65) | 549 (77) | <0.0001 |
| Yes | 568 (35) | 168 (23) | |
| Chemotherapy | |||
| No | 920 (56) | 369 (51) | 0.031 |
| Yes | 714 (44) | 348 (49) | |
| Radiation therapy | |||
| No | 984 (60) | 391 (55) | 0.011 |
| Yes | 650 (40) | 326 (45) | |
| Insurance type‡′ | |||
| Medicare w/o supplement | 424 (26) | 283 (39) | <0.0001 |
| Medicare with supplement | 511 (31) | 109 (15) | |
| Medicaid | 92 (6) | 105 (15) | |
| Private insurance | 530 (32) | 145 (20) | |
| No insurance/self-pay | 77 (5) | 75 (10) | |
†Fisher’s Exact (categorical variables), Exact Deuchler-Wilcoxon (continuous variables). §Cigarette, cigar, pipe, smokeless (snuff, chew).
‡Missing values were imputed using the expectation-maximization algorithm (n = 10 simulations).
′Fraction missing information (Tobacco Use = 0.019; Insurance Type = 0.0098).
AA = African-American; LCNEC = large cell neuroendocrine carcinoma; NSCLC NOS = non-small-cell lung carcinoma not otherwise specified; SCC = squamous cell carcinoma; SCLC = small cell lung carcinoma; SD = standard deviation; IQR = Interquartile range.