An investigator finds 5 independent factors presence or absence of which co-relates with the disease. What type of analysis is this? (LQ)
|B|| Multiple regression|
|C||Chi square Test|
Types of regression:
Based on the number of independent variables
a. Simple: only 1 independentvariable is used to calculate the value of dependent variable
b. Multiple regression: While multiple linear regression relates more than one independent explanatory or predictor variable used to calculate the value of dependent variable, as in our question, 5 independent factors are determining the presence or absence of the disease. Since the dependent variable in this case is a dichotomous qualitative variable, the best answer to this question should have been multiple logistic regression.
Based on the type of dependent and independent variable:
a. Linear regression: Both dependent and independent variables are quantitative in nature
b. Logistic regression:Dependent variable is qualitative or dichotomous and independent variable is also qualitative or quantitative or a mix of the two.
c. Curvilinear regression: Curvilinear regression deals with the problem of predicting the most likely factor for a single particular variable.
d. ANOVA is used to compare ≥3 mean values
e. Chi square is a test of proportion
f. Wilcoxan test is used to compare the medians when the data is ordinal