@Ecstatic_Hamster Appreciate the input, Hamster. Yes, I think you are correct, about losing weight that fast. I have no arguments there. But, in my brother's case, he would've lost his life anyway, had he not made any changes. He had to have emergency medical intervention to save his life. That was a turning point for him. He went hard in one direction, and just hung on to life, and now is going hard in what he sees as the best direction, based on the results. I sense after the shock of an emergency situation, and now the weight correction, he may come back to the middle.
Those stats you provide are interesting. Am I missing the obvious, or is it being claimed that as little as a 10.5% decrease in BMI, over a 2.2 year span, caused an increased risk of all-cause morality? I'm not saying it's not true, I'm just surprised by those numbers. Arguably, an over weight person could have other troubles by not reducing at least 10.5% BMI, it would seem.