Demographic features of 89 Oklahoma TTP patients, 1995-2017
| Feature . | Data . |
|---|---|
| Median age (range), y | 40 (9-78) |
| Sex, female, n (%) | 67 (75) |
| Race, black, n (%) | 35 (39) |
| BMI, kg/m2, n (%) | >40, 21 (24) |
| Feature . | Data . |
|---|---|
| Median age (range), y | 40 (9-78) |
| Sex, female, n (%) | 67 (75) |
| Race, black, n (%) | 35 (39) |
| BMI, kg/m2, n (%) | >40, 21 (24) |
Data for age and BMI are from the day of diagnosis of the initial episode of TTP. Compared with the population of the 58 counties included in the Oklahoma TTP Registry region, the standardized TTP incidence rate was sevenfold higher in blacks compared with nonblacks for the 72 patients enrolled through 2012, when the frequency of black patients was 36%.21 The patients’ BMI was significantly greater than the expected US values based on age, race, and sex values obtained from the National Health and Nutrition Examination Survey (NHANES) data (P < .001). The frequency of BMI > 40 kg/m2 in the age-, race-, and sex-adjusted US population is 9%. A BMI of 40 kg/m2 is equivalent to a person 5 feet 6 inches tall, weighing 250 pounds.