Odds ratio is like a number that tells you how likely something is to happen. It compares two different things. Let's say you want to know if it's more likely that you will get a pizza or an ice cream. You could look at the odds ratio to find out. The odds ratio might say that you are 4 times more likely to get a pizza than ice cream. That means if you had 4 chances of getting something, you would have a better chance of getting a pizza than an ice cream.