BMI and BMI Percentile Change by Lung Function
Lung function classification was based on the CFF’s description of lung disease severity in their latest annual report20. In the adult group, 13 participants were found to have normal lung function, defined as a percent predicted FEV1 (ppFEV1) above or equal to 90%. These patients saw an increase in BMI by 0.92 (1.34) kg/m2. Sixteen participants had a ppFEV1 between 70 and 89%, indicating mild lung disease. They were found to have an average increase in BMI of 1.45(1.87) kg/m2. The next group of participants was defined as having moderate lung disease based on a ppFEV1 between 40 and 69%. Nineteen of the adult patients had lung function values within this range. The average increase in BMI in this population was 1.5 (1.83) kg/m2. The last 16 adults have severe lung disease as their ppFEV1 was ≤ 40%. This population had the most significant increase in BMI with an average change of 1.94 (1.45) kg/m2.
In the pediatric group, 26 children had normal lung function; the mean increase of BMI percentile in this group was 7.04 (17.8) percentile. Six children fell into the mild lung disease category and had an average increase in BMI percentile of 5.83 (11.99) percentile. The moderate lung disease category for pediatric participants consisted of 6 children. This group saw an average growth of 16.5 (17.6) percentile. There were no pediatric patients that fell into the severe lung disease category.