    Sentence 1: By, comparison, ,. the  proportion of people with a BMI  of 50 or above increased by a  factor of Five from, about. 1  in 2,000 to:one in 400. .         Sentence. 2: Those with a BMI. of  50. or. “greater, sometimes  called super obesity :  increased by a factor of five    > From gpe gan 2,000 to, one in  400 . “    a  ball