Odds Ratio
The odds ratio for a continuous predictor or categorical predictor with reference or overparameterized coding is obtained by exponentiating the parameter estimate:
The odds ratio gives the relative amount by which the odds of the outcome increase (if odds ratio >1) or decrease (if odds ratio <1) when the value of predictor is increased by 1 unit.
The odds ratio for a sigma-restricted coded categorical variable is given by:
