Table 2. Expected and Observed LDCT Rates for March 20 to February 21 and March 21 to February 22 From a Prediction Model Using the 2017 to 2019 Cohortsa.
| Characteristic | March 20 to February 21 | March 21 to February 22 | ||||
|---|---|---|---|---|---|---|
| LDCT rate per 1 000 000 | O/E ratio (95% CI) | LDCT rate | O/E ratio (95% CI) | |||
| Expected (95% CI) | Observed | Expected per 1 000 000 (95% CI) | Observed | |||
| All | 14 939 (14 782-15 096) | 11 411 | 0.76 (0.76-0.77) | 17 666 (17 445-17 887) | 15 201 | 0.86 (0.85-0.87) |
| Age, y | ||||||
| 55-65 | 26 376 (25 780-26 972) | 19 690 | 0.75 (0.73-0.76) | 31 339 (30 502-32 176) | 25 699 | 0.82 (0.80-0.84) |
| 66-70 | 17 093 (16 823-17 364) | 13 383 | 0.78 (0.77-0.80) | 20 198 (19 818-20 578) | 18 012 | 0.89 (0.87-0.91) |
| 71-75 | 14 069 (13 798-14 339) | 10 670 | 0.76 (0.74-0.77) | 16 712 (16 330-17 094) | 14 293 | 0.85 (0.84-0.87) |
| 76-79 | 4690 (4486-4894) | 3944 | 0.84 (0.81-0.88) | 5612 (5325-5898) | 5943 | 1.06 (1.01-1.11) |
| Sex | ||||||
| Male | 16 544 (16 301-16 787) | 12 790 | 0.77 (0.76-0.78) | 19 577 (19 234-19 920) | 16 913 | 0.86 (0.85-0.88) |
| Female | 13 587 (13 383-13 791) | 10 253 | 0.75 (0.74-0.77) | 16 057 (15 769-16 346) | 13 772 | 0.86 (0.84-0.87) |
| Race | ||||||
| Black | 10 714 (10 239-11 191) | 7983 | 0.75 (0.71-0.78) | 12 610 (11 938-13 282) | 11 289 | 0.89 (0.85-0.94) |
| Hispanic | 5892 (5447-6337) | 4174 | 0.71 (0.66-0.77) | 6908 (6280-7535) | 6389 | 0.92 (0.85-1.02) |
| White | 16 350 (16 167-16 532) | 12 513 | 0.77 (0.76-0.77) | 19 340 (19 083-19 560) | 16 492 | 0.85 (0.84-0.86) |
| Otherb | 9409 (8907-9911) | 7178 | 0.76 (0.72-0.81) | 11 189 (10 479-11 899) | 10 019 | 0.89 (0.84-0.95) |
| Medicaid | ||||||
| No | 14 008 (13 845-14 171) | 10 886 | 0.78 (0.77-0.79) | 16 567 (16 336-16 798) | 14 546 | 0.88 (0.86-0.89) |
| Yes | 21 173 (20 668-21 679) | 15 154 | 0.72 (0.70-0.73) | 25 144 (24 435-25 854) | 20 288 | 0.81 (0.78-0.83) |
| PCP | ||||||
| No | 13 813 (13 633-13 993) | 10 480 | 0.76 (0.75-0.77) | 16 398 (16 143-16 653) | 14 470 | 0.88 (0.87-0.90) |
| Yes | 17 586 (17 278-17 894) | 13 632 | 0.77 (0.76-0.79) | 20 725 (20 292-21 159) | 17 649 | 0.85 (0.83-0.87) |
| Comorbidity score | ||||||
| <0 | 17 160 (16 846-17 474) | 13 133 | 0.77 (0.75-0.78) | 20 279 (19 836-20 722) | 17 725 | 0.87 (0.85-0.89) |
| 0 | 10 017 (9826-10 207) | 7234 | 0.72 (0.71-0.74) | 11 797 (11.525- 12.070) | 10 577 | 0.90 (0.88-0.92) |
| >0 | 20 636 (20 277-20 995) | 16 357 | 0.79 (0.78-0.81) | 24 400 (23 895-24 906) | 21 232 | 0.87 (0.85-0.89) |
Abbreviations: LDCT, low-dose computed tomography; O/E, observed/expected; PCP, primary care physician.
a
A linear probability model was used for each sub-cohort, with year as the only variable in the models.
b
Other includes Asian/Pacific Islanders, American Indian/Alaska native, or others.