which test to use

[throbbingheart01]

dmf index(decay missed filled) used in oral hygiene or oral examination

we want to compare the dmf index that is a numerical valve with

1.age
2.risk factors
3.brushing habits

what model should be used ?

thanks

help will be appreciated

[Cubytus]

So you have a discrete, ordinal, categorical variable to compare with:

1- age = continuous variable
2- risk factors = discrete variable
3- brushing habits... graded on a discrete scale, or continuous one?