Body Mass Index (BMI) is used to calculate obesity in patients. BMI is calculated by dividing an individual's body weight (in kilograms) by the square of their height (in meters).

For example:
* For a person weighing 75 kg and with a height of 1.70 m, the BMI is: 75 / (1.70 * 1.70) = 75 / 2.89 ≈ 25.95 (Overweight)
* For a person weighing 90 kg and with a height of 1.70 m, the BMI is: 90 / (1.70 * 1.70) = 90 / 2.89 ≈ 31.14 (Obese - in the group with increased risk of diabetes and other diseases)

Based on Body Mass Index values, obesity status is generally classified into six categories. You can calculate your BMI based on your height and weight and evaluate your status according to the data below:

* Underweight: < 18.5
* Normal: 18.5 - 24.9
* Overweight: 25.0 - 29.9 (Slightly increased risk of diabetes and heart disease)
* Obesity Class I: 30.0 - 34.9 (Increasing risk of diabetes and other diseases)
* Obesity Class II (Morbid Obesity): 35.0 - 39.9
* Obesity Class III (Super Morbid Obesity): > 40.0 (High risk for fatal diseases)

Generally, a Body Mass Index above 30 is defined as obesity, above 40 as morbid obesity, and above 50 as super morbid obesity. Symptoms such as snoring, excessive sweating, sleep apnea, joint and back pain, skin irritation-related infections, and shortness of breath and fatigue even with minimal physical activity may also be observed in obese patients.