Table 1.
Baseline characteristics in cases versus matched controls.
| Characteristic1 | Cases (n=65) | Controls (n=350) | p value2 |
|---|---|---|---|
| Age (years), mean (SD) | 58.3 (16.0) | 57.1 (16.8) | 0.59 |
| Gender (female) | 33 (51) | 190 (54) | 0.60 |
| Weight (kg), mean (SD) | 80.4 (29.4) | 80.1 (31.9) | 0.96 |
| BMI (kg/m2), mean (SD) | 23.6 (20.0) | 26.9 (25.2) | 0.18 |
| Heparin agent | 0.92 | ||
| Heparin | 59 (91) | 319 (91) | |
| Enoxaparin | 6 (9) | 31 (9) | |
| Race/ethnicity3 | 0.97 | ||
| White | 55 (85) | 298 (85) | |
| Black | 1 (2) | 6 (2) | |
| Asian | 0 (0) | 1 (0) | |
| Other | 9 (14) | 45 (13) | |
| Percent ancestry3 | |||
| European (%) | 88 (26) | 89 (27) | 0.88 |
| African (%) | 11 (26) | 10 (25) | 0.68 |
| Native American (%) | 1 (2) | 2 (7) | 0.32 |
| 4Ts Score, mean (SD)4 | 5.1 (0.9) | - | - |
BMI indicates body mass index; cm, centimeters; kg, kilograms; SD, standard deviation.
1
Values represent number (percentage) unless otherwise specified
2
P values represent results of chi square and t-tests where appropriate
3
Race/ethnicity values are those determined by STRUCTURE based on ancestry informative markers (>90% ancestry).
4
4Ts scored according to American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (Linkins et al. Chest 2012;141:e495S–530S)