Table 1. Patients' sociodemographic characteristics at baseline and follow-up, by intervention status.
| Characteristic | Baseline ( n = 1,277) | Follow-up ( n = 1,471) | ||||
|---|---|---|---|---|---|---|
| Usual care ( n = 937), n (% a ) | Intervention ( n = 340), n (% a ) | p -Value b | Usual care ( n = 1,086), n (% a ) | Intervention ( n = 385), n (% a ) | p -Value b | |
| Age, mean (range), SD | 57.1 (22–89), 13.3 | 54.9 (22–86), 13.6 | 0.033 | 56.7 (19–94), 13.8 | 55.6 (23–98), 13.1 | 0.090 |
| Male gender | 148 (15.8) | 30 (8.8) | 0.001 | 208 (19.2) | 49 (12.7) | 0.004 |
| Race/ethnicity | <0.001 | <0.001 | ||||
| White | 441 (47.1) | 202 (59.4) | 482 (44.4) | 222 (57.7) | ||
| Black | 214 (22.8) | 67 (19.7) | 249 (22.9) | 80 (20.8) | ||
| Asian | 184 (19.7) | 30 (8.8) | 234 (21.5) | 33 (8.6) | ||
| Hispanic | 69 (7.4) | 25 (7.4) | 92 (8.5) | 37 (9.6) | ||
| Other | 13 (1.4) | 7 (2.1) | 12 (1.1) | 5 (1.3) | ||
| Unknown | 16 (1.7) | 9 (2.7) | 17 (1.6) | 8 (2.1) | ||
| English preferred language | 768 (82.0) | 304 (89.4) | 0.001 | 877 (80.8) | 347 (90.1) | <0.001 |
| Insurance | 0.047 | 0.083 | ||||
| Commercial | 486 (51.9) | 205 (60.3) | 547 (50.4) | 207 (53.8) | ||
| Medicare | 272 (29.0) | 83 (24.4) | 313 (28.8) | 103 (26.8) | ||
| Medicaid or self-pay | 173 (18.5) | 52 (15.3) | 217 (20.0) | 66 (17.1) | ||
| Other or unknown | 6 (0.6) | 0 | 9 (0.8) | 9 (2.3) | ||
| Clinic | 0.781 | 0.423 | ||||
| Adult primary care | 875 (93.4) | 316 (92.9) | 1,030 (94.8) | 361 (93.8) | ||
| Pulmonary | 62 (6.6) | 24 (7.1) | 56 (5.2) | 24 (6.2) | ||
| Imaging tests per person, mean (range), SD | 1.3 (1–5), 0.6 | 1.2 (1–6), 0.6 | 0.007 | 1.2 (1–4), 0.4 | 1.2 (1–5), 0.6 | 0.343 |
Abbreviation: SD, standard deviation.
a
Totals may not add to 100% due to rounding.
b
Chi-square test for categorical variables, Wilcoxon's rank-sum test for continuous variables.