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Severe thinness: ₆0 up to 70 kg b or > 56. 3 up to 76. 6 kg c Overweight (pre-obesity) 25-29. 99 >70 up to 100 kg b or 76. 7 up to 92. 0 kg c Obesity > ₃0 >100 kg b or > _ 92. 1 kg c ; or > 20% greater than the ideal body weight d Class 1 30-34. 99 Class 2 (moderate obesity) 35-39. 99 >100% greater than the ideal body weight d Class 3 (severe or morbid obesity) > ₄0 > ₁50 kg b or > _ 122. 9 kg c Class 4 (super-obesity) 227 > ₅0 >225% greater than the ideal body weight Class 5 (super-super or extreme obesity) 228 > ₆0 a According to the WHO classification for adults > ₂0 years, female, and male subjects; http: //www. who. int/topics/obesity/en/ (January 2018) unless otherwise indicated. b Thresholds often used to define underweight in RCT or clinical studies for both female and male subjects. c According to the Centers for Disease Control and Prevention for adults (both male and female subjects) with height of 5 feet 9 inch https: //www. cdc. gov/obesity/adult/defin ing. html (January 2018). d Ideal body weight according to modified Devine's formula: men: 51. 65 kg 1. 85 kg/inch of height greater than 5 feet; Women: 48. 67 kg 1. 65 kg/inch of height greater than 5 feet. 226
Rocca et al. (Thu,) studied this question.