Categorical variables are also known as qualitative (or discrete) variables. These categorical variables can be further classified as being nominal, dichotomous or ordinal variables. Each of these types of categorical variable (i.e., nominal, dichotomous and ordinal) has what are known as categories or levels. These categories or levels are the descriptions that you give a variable that help to explain how variables should be measured, manipulated and/or controlled.
BetimolÂ® (timolol ophthalmic solution), 0.25% and 0.5%, is a non-selective beta-adrenergic antagonist for ophthalmic use. The chemical name of the active ingredient is (S)-1-[(1,1-dimethylethyl)amino]-3-[(4-(4-morpholinyl)-1,2,5-thiadiazol-3-yl]oxy]-2-propanol. Timolol hemihydrate is the levo isomer.
Generic name: Metronidazole. Other brand name: Protostat. Flagyl (metronidazole) is an antibacterial drug that is classified as a broad-spectrum antibiotic. It is used to kill any bacteria in the body that are causing infection. In some cases, Flagyl may be used to treat infections or other complications of IBD. It might be given alternately or at the same time as ciprofloxacin, another type of antibiotic.