Table 2.
Relative risk of an AA patient presenting with Stage III/IV lung cancer by insurance type (N = 2,351)
| Type of health insurance | Stages | Relative risk (95% CI) | |||
|---|---|---|---|---|---|
| III/IV | I/II | Unadjusted† | Adjusted model 1†¥ | Adjusted model 2₰ | |
| n (%) | n (%) | ||||
| All insurance types (n = 2,351) | |||||
| White | 976 (65) | 658 (77) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 516 (36) | 201 (23) | 1.20 (1.13-1.28) p < 0.0001 | 1.19 (1.12-1.27) p < 0.0001 | 1.17 (1.10-1.24) p < 0.0001 |
| Medicare w/o supplement (n = 707) | |||||
| White | 248 (56) | 176 (66) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 193 (44) | 90 (34) | 1.17 (1.04-1.31) p = 0.0077 | 1.16 (1.03-1.29) p = 0.013 | 1.15 (1.02-1.28) p = 0.018 |
| Medicare with supplement (n = 620) | |||||
| White | 296 (79) | 215 (87) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 77 (21) | 32 (13) | 1.22 (1.06-1.41) p = 0.0061 | 1.22 (1.05-1.40) p = 0.0073 | 1.21 (1.05-1.40) p = 0.010 |
| Medicaid (n = 197) | |||||
| White | 59 (44) | 33 (53) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 76 (56) | 29 (47) | 1.13 (0.93-1.37) p = 0.22 | 1.12 (0.92-1.36) p = 0.24 | 1.14 (0.94-1.37) p = 0.19 |
| Private insurance (n = 675) | |||||
| White | 313 (76) | 217 (83) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 101 (24) | 44 (17) | 1.18 (1.04-1.34) p = 0.012 | 1.16 (1.02-1.32) p = 0.024 | 1.14 (1.005-1.30) p = 0.042 |
| No insurance/self-pay (n = 152) | |||||
| White | 60 (47) | 17 (74) | 1.0 Referent | 1.0 Referent | 1.0 Referent |
| AA | 69 (53) | 6 (26) | 1.18(1.03-1.35) p = 0.017 | 1.16 (1.0007-1.33) p = 0.040 | 1.15 (1.006-1.32) p = 0.041 |
†Relative risk and 95% confidence intervals (CI) computed using Poisson regression with robust variance estimation.
¥Adjusted for sex and smoking-related histology.
₰Adjusted for age (continuous), sex and smoking-related histology.
AA = African-American.