TABLE 1.
Patient characteristics after propensity score matching, stratified by email use*
| Variable | Email users | Nonemail users | |
|---|---|---|---|
| Total, No. (%) | 3223 (50.00) | 3223 (50.00) | |
| Age at treatment (years), Mean ±SD | 59.39 ± 14.69 | 59.41 ± 16.34 | |
| Gender, No. (%) | Female | 1,554 (49.78) | 1,568 (50.22) |
| Male | 1,669 (50.21) | 1,655 (49.79) | |
| Insurance payor at treatment, No. (%) | Private | 1,240 (50.24) | 1,228 (49.76) |
| Medicare | 1,214 (49.77) | 1,225 (50.23) | |
| Medicaid | 291 (49.07) | 302 (50.93) | |
| Unknown | 478 (50.53) | 468 (49.47) | |
| Ethnicity, No. (%) | Non‐Hispanic/Non‐Latino | 2,810 (49.92) | 2,819 (50.08) |
| Hispanic/Latino | 413 (50.55) | 404 (49.45) | |
| Race, No. (%) | White | 1,804 (49.68) | 1,827 (50.32) |
| Asian | 661 (49.62) | 671 (50.38) | |
| Black | 92 (48.68) | 97 (51.32) | |
| Other a | 39 (54.93) | 32 (45.07) | |
| Unknown | 627 (51.27) | 596 (48.73) | |
| Stage at diagnosis, No. (%) | 0 | 18 (43.90) | 23 (56.10) |
| 1 | 400 (49.32) | 411 (50.68) | |
| 2 | 551 (49.91) | 553 (50.09) | |
| 3 | 406 (50.37) | 400 (49.63) | |
| 4 | 841 (50.30) | 831 (49.70) | |
| Unknown | 1,007 (50.05) | 1,005 (49.95) | |
| Household Annual Income Estimation based on US Census data b , Mean ±SD | $98,350.93 ± $37,361.98 | $98,266.71 ± $36,961.44 | |
| Charlson Score b , Mean ±SD | 5.17 ± 3.32 | 5.17 ± 3.45 | |
| Primary cancer, No. (%) | Breast | 392 (49.75) | 396 (50.25) |
| Lung | 295 (51.13) | 282 (48.87) | |
| Pancreatic & biliary | 401 (50.70) | 390 (49.30) | |
| Blood, bone marrow, & hematopoietic system | 465 (50.32) | 459 (49.68) | |
| Lymphoma | 394 (49.68) | 399 (50.32) | |
| Head & neck | 222 (51.27) | 211 (48.73) | |
| Colorectal | 193 (50.79) | 187 (49.21) | |
| Prostate | 144 (50.70) | 140 (49.30) | |
| Upper gastrointestinal tract | 117 (47.76) | 128 (52.24) | |
| Ovarian | 85 (45.45) | 102 (54.55) | |
| Cervical & uterine | 101 (48.79) | 106 (51.21) | |
| Bladder | 77 (50.33) | 76 (49.67) | |
| Kidney & ureter | 47 (48.45) | 50 (51.55) | |
| Skin: melanoma | 71 (48.63) | 75 (51.37) | |
| Brain & other nervous system | 73 (51.41) | 69 (48.59) | |
| Connective & soft tissue | 49 (50.00) | 49 (50.00) | |
| Testicular | 26 (47.27) | 29 (52.73) | |
| Retroperitoneum & peritoneum | 23 (48.94) | 24 (51.06) | |
| Bone & joints | 17 (43.59) | 22 (56.41) | |
| Pleura | 7 (58.33) | 5 (41.67) | |
| Meninges | 2 (50.00) | 2 (50.00) | |
| Mediastinum | 7 (50.00) | 7 (50.00) | |
| Spleen | 6 (50.00) | 6 (50.00) | |
| Vagina & labia | 4 (57.14) | 3 (42.86) | |
| Orbit & lacrimal gland | 4 (50.00) | 4 (50.00) | |
| Vulva | 1 (33.33) | 2 (66.67) | |
a
Other race category includes Pacific Islander and Native American.
b
Continuous variable per point.
*
All p‐values were >0.7.