A study of pattern of body mass index (BMI) and prevalence of obesity in a Saudi population.

The present study was conducted to assess the pattern of body mass index (BMI) prevalence of obesity, and the association between obesity and other health-related problems in a Saudi population. The study was conducted in Queza district of Jeddah, Saudi Arabia. A systematic random sample of Saudi nationals aged 16 years and above were selected (total number 1037; 611 males and 426 females). The study population was clinically examined and a specially-designed questionnaire was administered to obtain the information. Anthropometric measurements, blood pressure and urine analysis were carried out. The collected data were analyzed using simple as well as multivariate statistical methods. It was observed that BMI significantly increased with age. The crude mean BMI was significantly greater in females compared to males. Prevalence of Grade I obesity among different age groups in males ranged from 15.7% to 43.0%, while in females the range was from 22.8% to 45.7%. Similar patterns for both genders were found for Grade II obesity (5.2%-18.9%; and 11.1%-47.8% respectively). Obesity was significantly associated with an increase in both systolic and diastolic blood pressure, where increase in BMI by one unit increased systolic blood pressure by 0.617 mm Hg, and diastolic blood pressure by 0.484 mm Hg. This relationship held true even after allowing for other confounding factors. The present study concluded that obesity is a problem prevalent in the community of Queza district. It is recommended that health education programs be implemented through primary health care services in the community to prevent this problem.