Obesity is a multifactorial nutritional disorder that involves metabolic, environmental and sociocultural causes. In Brazil it is reaching alarming indexes in the last decades. It is considered as a predisposing factor to other health problems, and even the lightest form of obesity implies in a reduction of the quality of life. The morbid obesity (body mass index above 40 – see table) is considered the most serious form and is associated to complications such as: coronary disease, diabetes, arterial hypertension, dyslipidemia, respiratory problems and some types of cancer.
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OBESITY: CLASSIFICATION AND TREATMENT The excesso of weight may be classified from overweight to morbid obesity depending on the body mass index (see table).

Classification of the excess weight according to the BMI (weight/height2)
Overweight – Pre-obeso 25-29.9 Kg/m2
Obesity degree I 30-34.9 Kg/m2
Obesity degree II 35-39.9 Kg/m2
Obesity degree III From de 40 Kg/m2

The treatment for obesity is a challenge to both the doctor and the obese patient, for the success depends a loton the change of feeding habits and routines. The treatments proposed by health professionals are clinical (diet, physical exercise and drugs) and the surgical procedures, indicated according to the degree of the obesity. Part of the individuals submitted to a clinical treatment fail in reducing the weight or maintaining the weight loss. In some cases, alternatives such as the intragastric balloon may be considered auxiliary to the clinical treatment, while keeping the main components – nutritional education and physical exercises.The surgical procedures are associated to a better result in weight loss in the long run, but are considered only for the morbid obese.

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