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  • Medical use of bmi.

    I have noticed that medical people have a hard on for bmi . I understand about death rates being higher for bmi over 25 but is there some reason they ignore muscle mass and the actual fat % even in the case where there is dexa info?

  • #2
    I thought that they were starting to move away from BMI for those exact reasons?

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    • #3
      I didn't realize the medical community had a hard on for BMI. I thought it was just one of many ways to measure health risk.
      "Know the rules well, so that you may properly break them" - The Dalai Lama
      Do not criticize the seed for not yet being a tree.
      Character is destiny - Sigmund Freud
      As long as I have breath in my lungs, I will make this happen

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      • #4
        Why use bmi instead of dexa info ? I had thought they were moving away from it but recent experiences showed otherwise.

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        • #5
          Oh, so you have your dexa info, and they're ignoring it, looking only at your BMI?
          "Know the rules well, so that you may properly break them" - The Dalai Lama
          Do not criticize the seed for not yet being a tree.
          Character is destiny - Sigmund Freud
          As long as I have breath in my lungs, I will make this happen

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          • #6
            The usual BMI calculation has been proven rather inaccurate in the last few years and an adjusted equation had been proposed, but setting this as the new standard all over hasn't been a priority due to pretty much the uselessness of BMI. The only case where its useful is proving to someone they are way, way over weight. So don't take BMI too seriously.

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            • #7
              Originally posted by Pegasus View Post
              I have noticed that medical people have a hard on for bmi . I understand about death rates being higher for bmi over 25 but is there some reason they ignore muscle mass and the actual fat % even in the case where there is dexa info?
              Two reasons, cost and time. It doesn't take an expensive machine or require lots of training to use a scale and a tape measurer on someone. All doctors are looking for us a line to fill in on a chart, in order to assess your symptoms. BMI fits the bill being highly inaccurate but incredibly safe any easy to use.
              Sex is the great leveler, taste the great divider. - Pauline Kael

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              • #8
                Originally posted by Toadstool View Post
                Oh, so you have your dexa info, and they're ignoring it, looking only at your BMI?
                Yes. The doc isn't too bad and did look somewhat convinced yeah you do have some muscle type stuff . The dietican was not interested and told me I was borderline obese .

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                • #9
                  Originally posted by TheGreatDivider View Post
                  Two reasons, cost and time. It doesn't take an expensive machine or require lots of training to use a scale and a tape measurer on someone. All doctors are looking for us a line to fill in on a chart, in order to assess your symptoms. BMI fits the bill being highly inaccurate but incredibly safe any easy to use.
                  Yes but if you are standing there with dexa results why ignore it ? For that matter if a guy obviously is carrying more muscle than average and you are a medical pro shouldn't you notice( to be fair some do) ?

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                  • #10
                    Originally posted by Floppy and Useless View Post
                    The usual BMI calculation has been proven rather inaccurate in the last few years and an adjusted equation had been proposed, but setting this as the new standard all over hasn't been a priority due to pretty much the uselessness of BMI. The only case where its useful is proving to someone they are way, way over weight. So don't take BMI too seriously.
                    The basic premise of bmi is false .

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                    • #11
                      Originally posted by Pegasus View Post
                      Yes but if you are standing there with dexa results why ignore it ? For that matter if a guy obviously is carrying more muscle than average and you are a medical pro shouldn't you notice( to be fair some do) ?
                      Think about the cost involved there. Hospitals aren't going to buy a million dollar machine to be used hundreds of times a day, that requires lots of upkeep, and costs each patient a few hundred dollars just to know your exact body fat percentage. It's just not cost effective.

                      Hospitals have dexa machines but the only use them for bone density scans.
                      Sex is the great leveler, taste the great divider. - Pauline Kael

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                      • #12
                        Now if I could opt out if BMI and have insurance pay for a dexa scan.... I'd be willing to go for that.
                        Sex is the great leveler, taste the great divider. - Pauline Kael

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                        • #13
                          Originally posted by TheGreatDivider View Post
                          Think about the cost involved there. Hospitals aren't going to buy a million dollar machine to be used hundreds of times a day, that requires lots of upkeep, and costs each patient a few hundred dollars just to know your exact body fat percentage. It's just not cost effective.

                          Hospitals have dexa machines but the only use them for bone density scans.
                          Dexa has got a lot cheaper less than $100 Australian so that is less than $75 US .
                          I paid for the dexa so there was no cost to the medical people.

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                          • #14
                            By the way working on a false premise that a guy is way overweight when he is not could cost a lot.
                            Pegasus
                            Administrator
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                            Admin of the Month Mar 2015
                            Last edited by Pegasus; 08-13-2016, 12:22 AM.

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                            • #15
                              Wait a minute, I just thought about it and realized 99% of patients in hospitals don't care about the accuracy of their body fat tests. Hospitals aren't where healthy people worry about how much fat and muscle they carry, they're where the sick and injured get diagnosed, operated on, treated, and die.
                              Sex is the great leveler, taste the great divider. - Pauline Kael

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