Yeah I had to read this a few times too! I was totally baffled by having 3 categories for obesity, but one of the categories is grade 2 & 3 categories together,

Yeah I had to read this a few times too! I was totally baffled by having 3 categories for obesity, but one of the categories is grade 2 & 3 categories together, and one of the categories is grade 1, 2, & 3 together.