Table 1.
Characteristics of cases and controls by race
| Whites | Blacks | |||||
|---|---|---|---|---|---|---|
| Cases | Controls | p-value | Cases | Controls | p-value | |
| N=416 | N=511 | N=440 | N=443 | |||
| Age (SD) | 50.5 (12.7) | 50.8 (12.8) | 0.79 | 47.1 (12.5) | 47.8 (12.4) | 0.42 |
| Sex (%) | ||||||
| Male | 57.9 | 56.8 | 0.72 | 42.5 | 40.9 | 0.62 |
| Female | 42.1 | 43.2 | 57.5 | 59.1 | ||
| Diabetes (%) | 14.9 | 4.9 | <.0001 | 25.2 | 15.8 | 0.0005 |
| Obese (%) | 38.7 | 22.1 | <.0001 | 42.5 | 45.4 | 0.39 |
| High blood pressure (%) | 39.7 | 28.8 | 0.0005 | 50.5 | 45.2 | 0.11 |
| Current smoker (%) | 37.4 | 30.3 | 0.0002 | 22.3 | 21.7 | 0.31 |
| Family history VTE (%) | 30.5 | 12.6 | <.0001 | 26.6 | 11.2 | <.0001 |
| History of cancer (%) | 36.9 | 16.2 | <.0001 | 22.1 | 6.3 | <.0001 |
| Sickle cell disease (%) | 0 | 0 | 2.1 | 0 | 0.002* | |
| Sickle cell trait (%) | 0 | 0 | 10.7 | 6.6 | 0.03 | |
| Factor V Leiden (%) | 12.3 | 6.7 | 0.003 | 2.1 | 1.1 | 0.27 |
| Event type (%) | ||||||
| DVT only | 63.0 | N/A | 64.1 | N/A | ||
| PE ± DVT | 37.0 | N/A | 35.9 | N/A | ||
| Recurrent | 24.3 | N/A | 19.8 | N/A | ||
| Provoked | 61.8 | N/A | 57.7 | N/A | ||
*
Fisher’s exact p-value computed.