BC 1.x - BC 2.x

How do I know which equation set I should select for an individual?

The user’s guide for your software should have a brief description of each of the equation sets, and why it was created. (It may be in the FAQ section in the back.)

In general, most people tend to use the “NHANES-III” equation set. The equations for Fat and Fat-Free Mass, and Total Body Water were developed as part of the Fels Longitudinal Study, which collected information about a large cross-section of the American population. A second study was done which showed how the equations performed on data collected in the NHANES-III survey, which also included a large cross-section of the American population. As a result, it tends to provide good estimates for body composition for individuals with relatively nondescript body types — that is, they resemble a “typical American of their sex and (approximate) age.”

However, for people who do not resemble the general population, the accuracy of these equations will tend to degrade. For example:

For people who are very thin or very skinny or who, when you look at them, you can say “Just by looking at you, I can tell that you work out on a very regular basis,” the NHANES-III set will tend to over-estimate body fat. That is, they may estimate body fat too high. For these people, we generally recommend the “Athletic” equation set.

On the other end of the spectrum, for people who are very obese, the NHANES-III equations will tend to under-estimate fat. For these people, the “Obese” equation set will likely provide a more accurate estimate.

What are the minimum system requirements to run the BC software?

BC versions 1.0 – 2.1 require a Windows PC with the following:

  • 800 x 600 x 256 color screen setting
  • 30 MB of disk space minimum
  • 32 MB Memory (recommended 64 MB Memory)
  • 133 MHz Pentium Processor or equivalent (recommended 300 MHz Pentium-II Processor or equivalent)
  • Microsoft Internet Explorer 4.0 or greater (Recommended Microsoft I.E. 5.5 or greater)
  • Windows 95 / 98 / ME / 2000 / XP / 2003 / Vista / 7 / 8  — These versions have all been tested

BC version 2.1 and earlier CAN NOT be run natively on Mac OS.

The installer is asking me which analyzer I have. I have an older unit that isn’t on the list. Can I not use BC?

Some of our newer analyzers have advanced features that require additional software and/or special settings to be able to take advantage of them. This is why the installer is asking you what model analyzer you have. If you have an older analyzer that is not in the list, select the “Quantum-II”.

What programming language is BC written in?

BC versions 1.0 – 2.1 were written in Perl. If you have a copy of the Perl interpreter installed on your computer, BC may have issues. Please contact us for more information.

Can I run BC from a server across the network?

You can, but it is not recommended. Because of the way the program executable is built, you will see MASSIVE amounts of network traffic while the program is running. As a result, not only will your network be impacted, but your users will experience slow performance from BC. We recommend that BC be installed on each local workstation from which it will be used.

Can I configure BC to access databases from a centralized file server?

Yes. When you install BC, you will be presented with the choice of doing a “Standard” installation or an “Advanced” one. Choose “Advanced.” You will be given opportunities to specify locations for storing settings and databases.

I have a client who just underwent gender reassignment surgery. Now the body composition estimates are drastically different than they were before. What gives?

There’s more to being male (or female) than just your genetalia.

As we grow, our gender affects how our bones, muscles, etc grow, and how fat is distributed throughout the body. Because of this, equation sets will typically use different formulas to estimate body composition based on gender.

When entering data for a person, you should always use their biological sex / gender, regardless of which gender they currently self-identify as.

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