Loading....
Coupon Accepted Successfully!

PSM

Open Flashcards

Biostatistics

Question
51 out of 76
 

An investigator finds 5 independent factors presence or absence of which co-relates with the disease. What type of analysis is this? (LQ)


A Anova
B Multiple regression
C Chi square Test
D Wilcoxanson test

Ans. B Multiple regression Ref: High Yield Biostatistics, Pg: 50

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

Biostatistics Flashcard List

76 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
39)
40)
41)
42)
43)
44)
45)
46)
47)
48)
49)
50)
51)
52)
53)
54)
55)
56)
57)
58)
59)
60)
61)
62)
63)
64)
65)
66)
67)
68)
69)
70)
71)
72)
73)
74)
75)
76)