TABLE 1.
Prevalence of Cysts
| Parameter | Patients Screened (% of total) | Patients with Cyst | Cyst Prevalence per 100 (95% CI) | Odds Ratioa (95% CI) |
|---|---|---|---|---|
| Total | 2,832 (100) | 73 | 2.6 (2.0–3.2) | — |
| Age (y) | ||||
| 20–39 | 332 (11.7) | 0 | 0 | — |
| 40–49 | 439 (15.5) | 6 | 1.4 (0.2–2) | 1.00 (ref) |
| 50–59 | 711 (25.1) | 11 | 1.5 (0.6–2) | 1.13 (0.416–3.09) |
| 60–69 | 626 (22.1) | 18 | 2.9 (1.5–4.1) | 2.13 (0.84–5.43) |
| 70–79 | 528 (18.6) | 22 | 4.0 (2.4–5.9) | 3.14 (1.26–7.80) |
| 80–89 | 183 (6.5) | 16 | 8.7 (4.6–12.9) | 6.91 (2.66–17.96) |
| ≥90b | 13 (0.5) | 0 | 0 | — |
| Sex | ||||
| F | 1,387 (49.0) | 35 | 2.5 (1.7–3.3) | 1.00 (ref) |
| M | 1,445 (51.0) | 38 | 2.6 (1.8–3.4) | 1.04 (0.65–1.66) |
| Race or ethnicity | ||||
| White | 1,960 (69.2) | 51 | 2.6 (1.9–3.3) | 1.00 (ref) |
| Black | 648 (22.9) | 16 | 2.4 (1.3–3.7) | 0.95 (0.53–1.67) |
| Asian | 63 (2.2) | 3 | 4.7 (−0.6 to 10.2) | 1.87 (0.56–6.166) |
| Hispanic | 30 (1.1) | 0 | 0 | — |
| Other or unknown | 131 (4.6) | 3 | 2.3 (−0.3 to 4.9) | 0.88 (0.27–2.87) |
| Indication for CT | ||||
| Neoplasmsc | 1,113 (39.3) | 26 | 2.3 (1.4–3.2) | 1.00 (ref) |
| Digestive systemd | 333 (11.8) | 9 | 2.7 (0.9–4.4) | 1.16 (0.53–2.5) |
| Genitourinary systeme | 249 (8.8) | 10 | 4.0 (1.5–6.4) | 1.74 (0.83–3.67) |
| Circulatory systemf | 187 (6.6) | 8 | 4.0 (1.5–6.5) | 1.86 (0.83–4.19) |
| Otherg | 950 (33.5) | 20 | 2.1 (1.1–3.0) | 0.90 (0.49–1.62) |
Note—Dash indicates not applicable; ref indicates reference category.
a
Univariate analysis.
b
Oldest patient was 95 years old.
c
Adrenal adenoma, renal cell carcinoma, hemangioma, lung nodules, other.
d
Cirrhosis, hepatitis, hernias, irritable bowel disease, other.
e
Renal cyst, unspecified renal mass, other.
f
Abdominal aortic aneurysm, deep venous thrombosis, other.
g
Abnormal laboratory and clinical findings or pain (515), infectious disease (164), donor workup (91), and other (180).