The numerical component comes in handy when you want to ask about a length, weight, or number. In this example we are going to assume we want to use the length of our patient in a BMI calculation.
On the tab “Specific properties” you fill in a unit. This will be shown in the CRF behind the entering field. In the case of the abovementioned example you fill in “cm”, because a BMI calculation is based on a length in centimetres. By giving it a unit you prevent mistakes when the value is entered.
You can choose how many decimals you allow and if you want a minimum and maximum value. In our case you can say that we are working with a minimal value of 140 cm and a maximum value of 210 cm. This way you help control that patients or researchers actually fill in the length in centimetres. For the same reason you can choose not to allow any decimals.
If you enter a standard value, it will already filled in in the CRF when it is opened.