Table 1.
Patient Characteristics by Smoking Status
| Patient characteristics | Current smokers (n = 8423, 20.0%) | Former smokers (n = 12 462, 29.6%) | Never smokers (n = 18 877, 44.9%) | Unknown status (n = 2299, 5.5%) | Total N = 42 061 |
|---|---|---|---|---|---|
| Sex, n (%)a | |||||
| Females | 3761 (16.1) | 5759 (24.7) | 12 559 (53.9) | 1214 (5.2) | 23 293 |
| Males | 4661 (24.8) | 6703 (35.7) | 6317 (33.7) | 1080 (5.8) | 18 761 |
| Missing | 1 (14.3) | 0(0.0) | 1 (14.3) | 5 (71.4) | 7 |
| Age in year; median, mean (SD)b | 48, 46.8 (15.5) | 62, 59.5 (16.6) | 50, 49.5 (19.4) | 53, 52.3 (20.0) | 54, 52.1 (18.6) |
| Length of hospitalization in days; median, mean (SD)c € | 4, 6.3 (14.8) | 3, 5.8 (10.3) | 3, 5.4 (9.6) | 3, 7.2 (29.3) | 3, 5.8 (12.5) |
| Race, n (%)a | |||||
| Black | 2300 (20.5) | 2685 (23.9) | 5593 (49.8) | 662 (5.9) | 11 240 |
| White | 3658 (20.5) | 5953 (33.4) | 7249 (40.7) | 964 (5.4) | 17 824 |
| Other | 159 (12.6) | 244 (19.3) | 783 (61.8) | 80 (6.3) | 1266 |
| Missingd | 2281 (19.4) | 3592 (30.6) | 5261 (44.8) | 597 (5.1) | 11 731 |
| Insurance, n (%)a | |||||
| Medicare | 1701 (14.4) | 4604 (39.0) | 4914 (41.6) | 592 (5.0) | 11 811 |
| Medicaid | 1319 (28.0) | 967 (20.5) | 2215 (46.9) | 218 (4.6) | 4719 |
| Commercial | 1209 (15.3) | 2040 (25.8) | 4292 (54.3) | 360 (4.6) | 7901 |
| Uninsured | 1174 (36.2) | 634 (19.5) | 1081 (33.3) | 357 (11) | 3246 |
| Missingd | 2995 (20.8) | 4229 (29.4) | 6384 (44.4) | 776 (5.4) | 14 384 |
SD = standard deviation.
aChi-square test of independence p < .0001.
bChi-square test of median equality p < .0001.
cDuration of hospitalization was missing for 2007 patients.
dAbout one-third cases are missing information on race and insurance status because data linkage was not completed at the time of writing the paper. However, we do not believe that the smoking status rates as presented in the table above will vary much between the obtained partial sample and the full sample. Our plan is to add in the missing data when available.