Changes in spirometry parameters with the change in posture from sitting to supine positions in asymptomatic normal weight, overweight and obese young Omani males

  • Redha Issa Al Lawati Oman Medical Specialty Board, Muscat, Oman.
  • Al Yaqdhan Hamdan Al Atbi Oman Medical Specialty Board, Muscat, Oman.


Objectives Worldwide obesity is one of the major problems. Some studies say that in Oman it reaches up to 50% of the adult population.Obesity creates many complications in the body, mainly the respiratory system. Few studies were done to evaluate the effect of obesity onairflow parameters in pulmonary function test. Our study evaluates the effect of obesity on the airflow parameters while changing theposture from sitting to supine position in non-obese, overweight, and obese individuals.Methods About 30 subjects were divided into three groups according to their BMI. Physical examination was done and questionnaire wasgiven to the subjects prior to the procedure. Forced vital capacity maneuver was done for each subject at least five times spirometryparameters were derived from the flow volume curve obtained after expiratory effort.Results All the parameters were decreasing from sitting to supine position in all the three BMI groups except PEF in overweight group. Therewas no statistically significant difference between the three groups while comparing them in sitting or supine position. Also, the comparisonbetween each two groups in mean percentage difference showed no significant difference.Conclusion The study showed that the difference in airflow parameters with the change in posture from sitting to supine position was notsignificantly different in obese subjects as compared with non-obese and overweight subjects. This insignificant result may be due to smallsample size or because of the fixed age group [19–25 years old]. Females were not included in the study. The study has generated somebackground information on lung functions of obese but otherwise asymptomatic Omani males which can be used for study of lungfunction in morbidly obese subjects.
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How to Cite
AL LAWATI, Redha Issa; AL ATBI, Al Yaqdhan Hamdan. Changes in spirometry parameters with the change in posture from sitting to supine positions in asymptomatic normal weight, overweight and obese young Omani males. Iraq Medical Journal, [S.l.], v. 2, n. 3, p. 64-67, sep. 2018. ISSN 2521-8492. Available at: <>. Date accessed: 20 june 2019.