Demographic and clinical characteristics of HIT-positive and HIT-negative subjects
| Characteristic . | HIT positive (n = 21) . | HIT negative (n = 37) . | P value . |
|---|---|---|---|
| Age, mean (range) | 66 (39-89) | 63 (39-80) | .47 |
| Female gender, n (%) | 9 (42.9) | 19 (51.4) | .59 |
| Race, n (%) | .39 | ||
| White | 16 (76.2) | 23 (62.2) | |
| Black | 1 (4.8) | 6 (16.2) | |
| Other/unknown | 4 (19.0) | 8 (21.6) | |
| Patient population, n (%) | .06 | ||
| Cardiovascular surgery | 14 (66.7) | 14 (37.8) | |
| Surgery (noncardiovascular) | 5 (23.8) | 9 (24.3) | |
| Medicine | 2 (9.5) | 13 (35.1) | |
| Other | 0 | 1 (2.7) | |
| Setting, n (%) | .22 | ||
| Tertiary care hospital | 18 (85.7) | 26 (70.3) | |
| Community hospital | 3 (14.2) | 11 (29.7) | |
| Platelet count × 109/L, median (range)* | 50 (19-139) | 69 (3-883) | .29 |
| Recognized thrombosis, n (%)* | 14 (66.7) | 20 (54.1) | .41 |
| 4Ts score, median (interquartile range) | 6 (5-7) | 4 (3-5) | <.0001 |
| Received treatment for HIT, n (%) | 19 (90.5) | 25 (67.6) | .06 |
| Characteristic . | HIT positive (n = 21) . | HIT negative (n = 37) . | P value . |
|---|---|---|---|
| Age, mean (range) | 66 (39-89) | 63 (39-80) | .47 |
| Female gender, n (%) | 9 (42.9) | 19 (51.4) | .59 |
| Race, n (%) | .39 | ||
| White | 16 (76.2) | 23 (62.2) | |
| Black | 1 (4.8) | 6 (16.2) | |
| Other/unknown | 4 (19.0) | 8 (21.6) | |
| Patient population, n (%) | .06 | ||
| Cardiovascular surgery | 14 (66.7) | 14 (37.8) | |
| Surgery (noncardiovascular) | 5 (23.8) | 9 (24.3) | |
| Medicine | 2 (9.5) | 13 (35.1) | |
| Other | 0 | 1 (2.7) | |
| Setting, n (%) | .22 | ||
| Tertiary care hospital | 18 (85.7) | 26 (70.3) | |
| Community hospital | 3 (14.2) | 11 (29.7) | |
| Platelet count × 109/L, median (range)* | 50 (19-139) | 69 (3-883) | .29 |
| Recognized thrombosis, n (%)* | 14 (66.7) | 20 (54.1) | .41 |
| 4Ts score, median (interquartile range) | 6 (5-7) | 4 (3-5) | <.0001 |
| Received treatment for HIT, n (%) | 19 (90.5) | 25 (67.6) | .06 |
At time of HIT laboratory testing.