Table 1.
Frequency of Medicare outpatient characteristics and unadjusted adverse events within 30 days of receiving initial CT colonography (CTC) or initial optical colonoscopy (OC) between January 2007 and December 2008, (%)
| Initial CTC (n = 6,114) | Initial OC (n = 149,202) | p value | |
|---|---|---|---|
| Gender | <.001 | ||
| Male | 2223 (36.4) | 67586 (45.3) | |
| Female | 3891 (63.6) | 81616 (54.7) | |
| Age | <.001 | ||
| 66-74 | 2500 (40.9) | 82411 (55.2) | |
| 75-84 | 2700 (44.2) | 55893 (37.5) | |
| ≥85 | 914 (14.9) | 10898 (7.3) | |
| Race | <.001 | ||
| White | 5688 (93.0) | 130481 (87.5) | |
| Black | 239 (3.9) | 10133 (6.8) | |
| Other a | 78 (1.3) | 2946 (2.0) | |
| Asian | 52 (0.9) | 3197 (2.1) | |
| Hispanic | 57 (0.9) | 2445 (1.6) | |
| Comorbidities associated with Adverse Events | |||
| Atrial fibrillation / flutter | 1610 (26.3) | 18813 (12.6) | <.001 |
| Congestive heart failure | 1298 (21.2) | 19735 (13.2) | <.001 |
| Chronic pulmonary disease | 1759 (28.8) | 34149 (22.9) | <.001 |
| Diabetes | 1729 (28.3) | 45040 (30.2) | 0.001 |
| Stroke | 1419 (23.2) | 24457 (16.4) | <.001 |
| Renal disease | 636 (10.4) | 12827 (8.6) | <.001 |
| Diverticulosis | 2617 (42.8) | 85437 (57.3) | <.001 |
| Obesity | 298 (4.9) | 8010 (5.4) | 0.092 |
| Unadjusted adverse events within 30 days (risk per 1000 Medicare beneficiaries) | |||
| Gastrointestinal bleeding / transfusion | 76 (12.4) | 2471 (16.6) | 0.013 |
| Perforation | 4(0.7) | 181 (1.2) | 0.214 |
| Other GI | 110 (18.0) | 2692 (18.0) | 0.997 |
| --- Paralytic ileus | 11 (1.8) | 573 (3.8) | 0.011 |
| --- Nausea, Vomiting or Dehydration | 75 (12.3) | 1721 (11.4) | 0.623 |
| --- Abdominal pain | 34 (5.6) | 695 (4.7) | 0.311 |
| Cardiovascular disease | 278 (45.5) | 5167 (34.6) | <.001 |
| --- MI or angina b | 49 (8.0) | 1112 (7.5) | 0.617 |
| --- Arrhythmias | 148 (24.2) | 2754 (18.5) | 0.001 |
| --- CHF | 119 (19.5) | 1874 (12.6) | <.001 |
| --- Cardiac or respiratory arrest c | 28 (4.6) | 544 (3.6) | 0.238 |
| ---Syncope, Hypotension or Shock | 49 (8.0) | 945 (6.3) | 0.106 |
| Mortality | |||
| Death within 30 days | 21 (0.3) | 499 (0.3) | 0.905 |
a
Other includes Unknown and Native American
b
including chest pain
c
not including shortness of breath