Influence of body mass index and age on the lung function of obese women

to assess whether body mass, body mass index (BMI) and age influences vital capacity (VC) and forced expiratory volume in the first second (FEV₁) in women.

Methods:

81 women aged between 30 and 75 years participated in the study. The sample included obese and morbidly obese, non-smoking, sedentary individuals without chronic lung disorders. Anamnesis, anthropometric and spirometric evaluations were performed. Statistical analysis was carried out using the Pearson correlation and Spearman tests, adopting a significance level of 5%.

Results:

It was observed that age had significant and negative correlations with VC and its components: inspiratory reserve volume (IRV), expiratory reserve volume (ERV) and tidal volume (TV), and with FEV₁. There was also a significant positive correlation between body mass and VC and IRV and a significant negative correlation between BMI and ERV.

Conclusion:

Pulmonary function declines over time. Body mass appears to exert a greater influence on IRV, whereas a greater BMI is associated with a decline in ERV.

Key words:
Aging; Obesity; Spirometry; Physiotherapy

	Obese (n=38)		Morbidly obese (n=43)
	30 and 55 years (n=27)	56 and 75 years (n=11)	30 and 55 years (n=28)	56 and 75 years (n=15)
Age (years)	43.37±8.06	62±6.09	41.96±8.02	58.53±5.35
Height (m)	1.60±0.06	1.56±0.04	1.60±0.05	1.52 ± 0.03
Body Mass (Kg)	92.51±11.01	82.15±6.59	120.37±17.98	106.74±13.35
BMI (Kg/m²)	35.58±2.71	33.48±3.08	46.84±5.34	44.82±3.05

	Obese (n=38)			Morbidly obese (n=43)
	30 to 55 years (n=27)	p intragroup	56 to 75 years (n=11)	30 to 55 years (n=28)	p intragroup	56 to 75 years (n=15)	p intergroup
	30 to 55 years (n=27)	value	56 to 75 years (n=11)	30 to 55 years (n=28)	value	56 to 75 years (n=15)	value
VC (L)	2.99 ±0.65	0.02*	2.43 ±0.66	2.85 ±0.39	0.0056*	2.49 ±0.36	0.42
%Pred	90.40±15.22	0.56	86.79±22.27	87.26±9.38	0.22	91.21±11.03	0.82
ERV (L)	0.44±0.27	0.05	0.27±0.08	0.39+ 0.11	0.29	0.23±0.13	0.04*
%Pred	41.21±22.73	0.25	36.51±11.45	37.36+14.44	0.05	21.64±12.51	0.02*
IRV (L)	1.52±0.54	0.42	1.35±0.64	1.78±0.37	0.02*	1.43±0.56	0.02*
TV (L)	0.98±0.42	0.27	0.83±0.24	0.81±0.32	0.1	0.65±0.26	0.04*
FEV₁ (L)	2.63±0.61	0.09	2.25 ±0.64	2.50 ±0.43	0.01*	2.16 ±0.32	0.27
%Pred	94.94±16.70	0.37	101.34±26.43	90.99±13.19	0.07	98.69±13.42	0.41

Universidade do Estado do Rio Janeiro Rua São Francisco Xavier, 524 - Bloco F, 20559-900 Rio de Janeiro - RJ Brasil, Tel.: (55 21) 2334-0168 - Rio de Janeiro - RJ - Brazil
E-mail: revistabgg@gmail.com

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[1] Correspondence Eli Maria Pazzianotto Forti E-mail: empforti@unimep.br

	Age		Body Mass		BMI
VC	r=-0.55	p<0.0001*	r=0.29	p=0.0078*	r=0.07	p=0.4802
ERV	r=-0.25	p=0.020*	r=-0.04	p=0.7223	r=-0.30	p=0.029*
IRV	r=-0.37	p=0.0006*	r=0.29	p=0.0076*	r=0.19	p=0.0785
TV	r=-0.15	p=0.15	r=0.13	p=0.2316	r=-0.03	p=0.7566
FEV₁	r=-0.50	p<0.0001*	r=0.16	p=0.1382	r=-0.06	p=0.5627