Methods and materials …show more content…
The subjects are selected randomly, from the age of sixty through the age of eighty years old, male and female, and from all over the world so that the data may be applicable worldwide. This study do not check for other diseases that they might have. Each person will be tested for their vital capacity through the spirometer. The data recorded is the highest number in the spirometer, and then calculate the percent vital capacity. After all the vital capacity percentage is recorded, they are being averaged and calculate the standard