Proceedings of The Physiological Society

Europhysiology 2018 (London, UK) (2018) Proc Physiol Soc 41, PCB074

Poster Communications

Body mass and Body shape Versus Two Indices of Pulmonary Function

R. Velusamy1, S. Andrew R1, R. W1

1. Chettinad hospital and Research Institute, Chennai, Tamil Nadu, India.


  • Table 1 Results<\#13>

    **. Correlation is significant at the 0.01 level (2-tailed).

Introduction: Obesity is a cumbersome problem all over the globe. Conventionally, Body Mass Index(BMI) is used as a parameter to grade Obesity. As BMI fails to distinguish between muscle mass and fat; and fails to differentiate between central and peripheral obesity, there is a need for better parameters to be correlated with Pulmonary Function. Several studies had emphasized Waist Circumference (WC) and Waist - Hip ratio (WHR) as alternatives to BMI [1]. But, these serve as insufficient indicators as they measure only body size. A Body Shape Index (ABSI) [2] and Surface Based Body Shape Index (SBSI) [3] are two new parameters that consider both body shape and body size into account and are better measures of mortality than BMI. They are calculated using the formulae, ABSI=WC(m)/[BMI2/3×height1/2(m)] and SBSI=(H7/4)(WC5/6)/[(BSA)(VTC)] . The study was aimed to appraise the work done associated with BMI and Pulmonary Function and to correlate Body Shape with Pulmonary Function. Methods: The study was done in 100 medical and paramedical students. Spirometric measurements namely, FEV1/FVC and MVV were measured using a computerized spirometer. Anthropometric Measurements such as Height, Weight, Waist Circumference, Vertical Trunk Circumference[4] were made for calculating BMI, ABSI and SBSI and were correlated with FEV1/FVC and MVV. Results: (Table1): ABSI and SBSI are found to be significantly and negatively correlated with MVV. Correlation of BMI with FEV1/FVC showed significance. This finding correlated with previously carried out studies[5]. ABSI was positively correlated with FEV1/FVC. The significance is so low that it can be considered that the association between ABSI and FEV1/FVC was not picked up. There was a positive correlation between SBSI and FEV1/FVC. Conclusions: Our study is unique as it is the first study, which made efforts to correlate ABSI with FEV1/FVC and MVV in this part of the world. Increase in ABSI and SBSI were found to decrease MVV. Both ABSI and SBSI have outperformed BMI in correlation with MVV. Our study has paved way for future long term researches on body shape and pulmonary function, which has not been reported in this part of the world, so that it could facilitate screening of respiratory compromise. Also, increased ABSI and SBSI can serve as better indicators of obesity related respiratory problems. Change in ABSI and SBSI of a person over a period of time can be used as a prognostic indicator. Respiratory tolerance to exercise can be assessed using ABSI and SBSI since MVV is a marker of Respiratory muscle function.

Where applicable, experiments conform with Society ethical requirements