Table 2 Emergency Department CT use by Study Year and Demographics
From: Access to primary care and computed tomography use in the emergency department
|  | No CT Ordered During ED Visit (N = 497,894) | CT Ordered During ED Visit (N = 98,001) | Overall (N = 595,895) | Odds of Receiving a CT (95% CI) |
|---|---|---|---|---|
Age (years) | ||||
 Mean (SD) | 39.5 (25.95) | 52.6 (23.03) | 41.6 (25.95) |  |
Age Group | ||||
  < 18 | 120,840 (95.2%) | 6050 (4.8%) | 126,890 (21.3%) | ref. |
 18–34 | 112,055 (85.4%) | 19,105 (14.6%) | 131,160 (22%) | 3.41 (3.31, 3.51) |
 35–49 | 85,501 (82%) | 18,802 (18%) | 104,303 (17.5%) | 4.39 (4.26, 4.53) |
 50–64 | 75,231 (79.2%) | 19,741 (20.8%) | 94,972 (15.9%) | 5.24 (5.09, 5.40) |
 65–79 | 63,687 (76.4%) | 19,714 (23.6%) | 83,401 (14%) | 6.18 (6.00, 6.38) |
  > 79 | 40,580 (73.6%) | 14,589 (26.4%) | 55,169 (9.3%) | 7.18 (7.00, 7.41) |
Patient gender | ||||
 F | 257,526 (83.3%) | 51,674 (16.7%) | 309,200 (51.9%) | ref. |
 M | 240,368 (83.8%) | 46,327 (16.2%) | 286,695 (48.1%) | 0.96 (0.95, 0.97) |
Year | ||||
 2003 | 47,397 (85.8%) | 7844 (14.2%) | 55,241 (9.3%) | ref. |
 2004 | 47,410 (84.6%) | 8653 (15.4%) | 56,063 (9.4%) | 1.10 (1.07, 1.14) |
 2005 | 53,593 (85.6%) | 8980 (14.4%) | 62,573 (10.5%) | 1.01 (0.98, 1.05) |
 2006 | 52,694 (83.6%) | 10,342 (16.4%) | 63,036 (10.6%) | 1.19 (1.15, 1.22) |
 2007 | 52,006 (83.6%) | 10,176 (16.4%) | 62,182 (10.4%) | 1.18 (1.15, 1.22) |
 2008 | 51,588 (82.7%) | 10,818 (17.3%) | 62,406 (10.5%) | 1.27 (1.23, 1.31) |
 2009 | 50,534 (82.3%) | 10,832 (17.7%) | 61,366 (10.3%) | 1.30 (1.26, 1.34) |
 2010 | 50,258 (82%) | 11,010 (18.0%) | 61,268 (10.3%) | 1.32 (1.28, 1.37) |
 2011 | 48,411 (82.3%) | 10,382 (17.7%) | 58,793 (9.9%) | 1.30 (1.26, 1.34) |
 2012 | 44,003 (83.1%) | 8964 (16.9%) | 52,967 (8.9%) | 1.23 (1.19, 1.27) |
Chronic Conditions | ||||
 Hypertension | 39,825 (8.0%) | 15,231 (15.5%) | 55,056 (9.2%) | 2.12 (2.07, 2.16) |
 Cardiac Dysrhythmias | 22,000 (4.4%) | 6572 (6.7%) | 28,572 (4.8%) | 1.56 (1.51, 1.60) |
 Asthma/COPD | 22,101 (4.4%) | 4550 (4.6%) | 26,651 (4.5%) | 1.05 (1.02, 1.08) |
 Coronary Atherosclerosis | 20,565 (4.1%) | 5614 (5.7%) | 26,179 (4.4%) | 1.41 (1.37, 1.45) |
 Depression | 21,352 (4.3%) | 3378 (3.4%) | 24,730 (4.2%) | 0.80 (0.77, 0.83) |
 Diabetes | 18,718 (3.8%) | 5756 (5.9%) | 24,474 (4.1%) | 1.60 (1.55, 1.65) |
 Hyperlipidemia | 16,246 (3.3%) | 5975 (6.1%) | 22,221 (3.7%) | 1.93 (1.87, 1.98) |
 Malignancies | 15,034 (3.0%) | 6569 (6.7%) | 21,603 (3.6%) | 2.31 (2.24, 2.38) |
 Congestive Heart Failure | 12,154 (2.4%) | 3000 (3.1%) | 15,154 (2.5%) | 1.26 (1.21, 1.31) |
 Personality Disorders | 10,846 (2.2%) | 1527 (1.6%) | 12,373 (2.1%) | 0.71 (0.67, 0.75) |
No. Chronic Conditions | Â | Â | Â | Â |
 None | 343,771 (69.1%) | 49,989 (51.0%) | 393,760 (66.1%) | ref. |
 1–2 | 106,338 (21.4%) | 31,191 (31.8%) | 137,529 (23.1%) | 2.02 (1.98, 2.05) |
 3+ | 47,785 (9.6%) | 16,821 (17.2%) | 64,606 (10.8%) | 2.42 (2.37, 2.47) |
ED Departure Status | ||||
 Admitted | 85,750 (69.4%) | 37,833 (30.6%) | 123,583 (20.7%) |  |
 Discharged | 412,144 (87.3%) | 60,168 (12.7%) | 472,312 (79.3%) |  |
Race/Ethnicity | ||||
 White | 425,872 (82.9%) | 87,916 (17.1%) | 513,788 (86.2%) | ref. |
 Black | 26,599 (89.4%) | 3146 (10.6%) | 29,745 (5%) | 0.57 (0.55, 0.60) |
 Hispanic | 12,730 (87.5%) | 1826 (12.5%) | 14,556 (2.4%) | 0.70 (0.66, 0.73) |
 Asian | 8156 (86.1%) | 1317 (13.9%) | 9473 (1.6%) | 0.78 (0.74, 0.83) |
 Other | 24,537 (86.6%) | 3796 (13.4%) | 28,333 (4.8%) | 0.75 (0.72, 0.78) |
Primary Care Provider | ||||
 No | 214,304 (80.2%) | 52,982 (19.8%) | 267,286 (44.9%) | 1.57 (1.54, 1.58) |
 Yes | 283,590 (86.3%) | 45,019 (13.7%) | 328,609 (55.1%) | ref. |