Table 1.
Patient characteristics
| Characteristic | DVT on initial US, n = 111 | No DVT on initial US, n = 1184 |
|---|---|---|
| Patient age, mean ± SD (range), years | 64.94 ± 16.79 (28.53–97.54) | 64.03 ± 16.66 (11.17–100.32) |
| D-dimer testing, no. (%) | 15 (14) | 234 (20) |
| Men, no. (%) | 57 (51) | 519 (44) |
| Indications for US, no. (%)a | ||
| Pain or swelling | 94 (85) | 1079 (91) |
| History of DVT/PE | 12 (11) | 75 (6) |
| Miscellaneous (cellulitis, tachycardia, shortness of breath) | 5 (5) | 30 (3) |
| Location of US, no. (%) | ||
| Right proximal leg | 40 (36) | 442 (37) |
| Left proximal leg | 40 (36) | 449 (38) |
| Bilateral proximal legs | 31 (28) | 293 (25) |
a
Percentages do not total to 100% because of rounding.
DVT = deep venous thrombosis; PE = pulmonary embolism; SD = standard deviation; US = ultrasound.