Weight Status

Body mass index (BMI) was calculated for all male Registry participants 2 years of age or older with a valid height and weight, and corresponding weight status was assigned based on age and BMI. Among the male Registry participants between the ages of 2 and 19 years, 20% were obese, compared with 18.5% of the youth in the national population, as reported by the National Center for Health Statistics.1 Among male Registry participants 20 years of age and older, 34% were obese, compared with 19% of the national population. 1

Weight Status by Age and Hemophilia Type

Among male Registry participants with hemophilia A, 3% were underweight, 45% were normal weight, 25% were overweight, and 27% were obese. Proportion of overweight and obesity was higher in participants 20 years of age or older than participants younger than age 20. Among the Registry participants with hemophilia A who were younger than 20 years of age, 17% were overweight and 20% were obese. Among the Registry participants with hemophilia A who were 20 years of age or older, 34% were overweight and 33% were obese. (Table 4).

Among the Registry male participants with hemophilia B, 3% were underweight, 42% were normal weight, 26% were overweight, and 29% were obese, with similar patterns by age, as seen with hemophilia A. Among male Registry participants with hemophilia B who were younger than 20 years of age, 16% were overweight, and 20% were obese. Among the male Registry participants with hemophilia B who were 20 years of age or older, 34% were overweight and 37% were obese. (Table 5).

Table 4. Weight status for male Registry participants with hemophilia A, by age
Table 4. Weight status for male Registry participants with hemophilia A, by age
Hemophilia A
2– 19 years 2 ≥20 years 3 All
n % n % n %
Obese 665 20.3% 1,093 32.8% 1,758 26.6%
Overweight 538 16.5% 1,124 33.8% 1,662 25.2%
Normal 1,941 59.4% 1,043 31.3% 2,984 45.2%
Underweight 125 3.8% 68 2.0% 193 2.9%
BMI total 3,269 100.0% 3,328 100.0% 6,597 100.0%
Table 5. Weight status for male Registry participants with hemophilia B, by age
Table 5. Weight status for male Registry participants with hemophilia B, by age
Hemophilia A
2– 19 years 2 ≥20 years 2 All
n % n % n %
Obese 157 20.20% 342 36.60% 499 29.10%
Overweight 125 16.00% 319 34.20% 444 25.90%
Normal 468 60.10% 258 27.60% 726 42.40%
Underweight 29 3.70% 15 1.60% 44 2.60%
BMI total 779 100.00% 934 100.00% 1,713 100.00%

Due to rounding, percentages may not add up to exactly 100%


References

  1. National Center for Health Statistics – Prevalence of Obesity Among Adults and Youth: United States, 2015–2016- https://www.cdc.gov/nchs/products/databriefs/db288.htm
  2. BMI-for-age percentiles of age groups 2 to <20 years old were calculated and categorized using the CDC-recommended SAS® software program for the 2000 CDC Growth Charts. /nccdphp/dnpao/growthcharts/resources/sas.htm
  3. BMIs for individuals in this age group were calculated and categorized using CDC-recommended SAS® software program and guidelines https://www.cdc.gov/healthyweight/assessing/bmi/adult_bmi/index.html