Table 1. Baseline Patient Characteristics in Experiment 1.
| Variable | Patients, No. (%) | ||
|---|---|---|---|
| Overall (N = 1979) | Adherent to LCS (n = 693) | Nonadherent to LCS (n = 1286) | |
| Lung-RADS score | |||
| 1 or 2 | 1660 (83.9) | 490 (70.7) | 1170 (91.0) |
| 3 | 154 (7.8) | 83 (12.0) | 71 (5.5) |
| 4A | 99 (5.0) | 67 (9.7) | 32 (2.5) |
| 4B/X | 66 (3.3) | 53 (7.6) | 13 (1.0) |
| Age, y | |||
| <65 | 868 (43.9) | 268 (38.7) | 600 (46.7) |
| ≥65 | 1111 (56.1) | 425 (61.3) | 686 (53.3) |
| Sex | |||
| Female | 803 (40.6) | 276 (39.8) | 527 (41.0) |
| Male | 1176 (59.4) | 417 (60.2) | 759 (59.0) |
| Race and ethnicity | |||
| Asian | 169 (8.5) | 59 (8.5) | 110 (8.6) |
| Black | 130 (6.6) | 49 (7.1) | 81 (6.3) |
| Hispanic or Latino | 111 (5.6) | 35 (5.1) | 76 (5.9) |
| White | 1526 (77.1) | 540 (77.9) | 986 (76.7) |
| Othera | 43 (2.2) | 10 (1.4) | 33 (2.6) |
| Educational level | |||
| Less than college | 958 (48.4) | 337 (48.6) | 621 (48.3) |
| College graduate | 590 (29.8) | 186 (26.8) | 404 (31.4) |
| Postgraduate | 431 (21.8) | 170 (24.5) | 261 (20.3) |
| Family history of lung cancer | |||
| Yes | 466 (23.5) | 187 (27.0) | 279 (21.7) |
| No | 1513 (76.5) | 506 (73.0) | 1007 (78.3) |
| Smoking status | |||
| Current | 769 (38.9) | 246 (35.5) | 523 (40.7) |
| Former | 1210 (61.1) | 447 (64.5) | 763 (59.3) |
| Primary insurance | |||
| Medicare and/or Medicaid | 830 (41.9) | 328 (47.3) | 502 (39.0) |
| Private or commercial | 1121 (56.6) | 358 (51.7) | 763 (59.3) |
| Otherb | 28 (1.4) | 7 (1.0) | 21 (1.6) |
| Age-adjusted CCI score | |||
| 0 or 1 | 287 (14.5) | 72 (10.4) | 215 (16.7) |
| 2 or 3 | 1152 (58.2) | 403 (58.2) | 749 (58.2) |
| ≥4 | 540 (27.3) | 218 (31.5) | 322 (25.0) |
| Distance to screening centerc | |||
| ≤Median | 994 (50.2) | 346 (49.9) | 648 (50.4) |
| >Median | 985 (49.8) | 347 (50.1) | 638 (49.6) |
| Household incomed | |||
| ≤Median | 1029 (52.0) | 340 (49.1) | 689 (53.6) |
| >Median | 950 (48.0) | 353 (50.9) | 597 (46.4) |
| ADI state ranke | |||
| ≤Median | 1072 (54.2) | 387 (55.8) | 685 (53.3) |
| >Median | 907 (45.8) | 306 (44.2) | 601 (46.7) |
| Type of referring physician | |||
| Pulmonology, thoracic oncology, radiology, or surgery | 369 (18.6) | 176 (25.4) | 193 (15.0) |
| Otherf | 1610 (81.4) | 517 (74.6) | 1093 (85.0) |
| Expected follow-up examination | |||
| Before COVID-19 | 1468 (74.2) | 513 (74.0) | 955 (74.3) |
| During COVID-19 pause | 53 (2.7) | 11 (1.6) | 42 (3.3) |
| After COVID-19 pause | 458 (23.1) | 169 (24.4) | 289 (22.5) |
Abbreviations: ADI, Area Deprivation Index; CCI, Charlson Comorbidity Index; LCS, lung cancer screening; Lung-RADS, Lung CT Screening Reporting & Data System.
a
Subcategories were American Indian or Alaska Native, Native Hawaiian or Pacific Islander, more than 1 race, or racial and ethnic group not otherwise stated.
b
Subcategories were Veterans Health Administration (n = 1), self-pay (n = 27), and other insurance not specified (n = 1).
c
Median distance to a screening center was 6.84 miles.
d
Median household income was $73 478.
e
Median ADI state rank was 3.
f
Subcategories were family medicine, general internal medicine, and obstetrics and gynecology.