SESSION TITLE: Physiology/PFTs/Rehabilitation Posters
SESSION TYPE: Original Investigation Poster
PRESENTED ON: Wednesday, October 30, 2013 at 01:30 PM - 02:30 PM
PURPOSE: Expiratory reserve volume (ERV) is an early measure of lung function to change with obesity. We conducted this study to evaluate the effect of waist/height (WHt) ratio on ERV as compared to body mass index (BMI) and waist/hip (WH) ratio.
METHODS: We did a retrospectively analysis of pulmonary function test (PFT) of all patients referred to PFT laboratory at an academic institution. A total of 303 patients were included. All patients underwent PFT’s as per the American Thoracic Society guidelines. Height, weight, waist and hip circumference were collected for all patients. Patients without these anthropometric data were excluded from the study.
RESULTS: There was significant negative correlation of ERV with both WHt ratio and BMI (-0.51 and -0.45 respectively with p value <0.05). There was no significant correlation of WH ratio with ERV (0.87, p value 0.07).
CONCLUSIONS: ERV decreases significantly in individuals with increase in both BMI and WHt ratio but WHt ratio is better predictor of change in ERV. There is no significant change of ERV with WH ratio.
CLINICAL IMPLICATIONS: Increase in BMI is associated with a decreased ERV. Association of ERV with other parameters of body fat distribution (WHt ratio and WH ratio) has not previously been evaluated. This study suggests that WHt ratio is a more sensitive parameter of body fat distribution to predict change in lung function test when compared with BMI. Including the WHt ratio as a standard measurement with pulmonary function testing, may help with interpretation of PFT patterns with change in body fat distribution.
DISCLOSURE: The following authors have nothing to disclose: Anup Singh, Navitha Ramesh, Neelima Divakaran, Wei Wang, Jason Lyons, James Murray
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