BMI and SDS Values

    The  HbA-.7ex1c is measured in different ways, and it is often difficult to compare the different results. Sometimes it is also wished to compare data independently of the patients' age and sex. The SDS -- the standard deviation score -- is used to solve this problem. For the calculation of the SDS, the average and the standard deviation of ``normal'' people's values for the same measure is required. If I is the individual value, M the mean of the control values, and S the standard deviation of the same group, the SDS is calculated in the following way:

$\{I-MS\}$

Another value used, is the body mass index -- BMI. This value is applied to indicate the amount of fat a body has stored. It is often used to early detect a possible over weight. If a patient's height is given in meters, and his weight in kilogram, his BMI is calculated this way:

$\{weightsize2\}$