A study is conducted in patients with HIV. The primary outcome is CD4 cell count
ID: 3233116 • Letter: A
Question
A study is conducted in patients with HIV. The primary outcome is CD4 cell count, which is the measure of the stage of the disease. A regression analysis is performed relating CD4 count to the duration of HIV in years. The computer output appears below:
PARAMETER
STD ERROR
T-VALUE
PR>T
INTERCEPT
511.91
70.3212
136.72
0.0052
DURATION
-30.87
14.35
-29.34
0.0038
The fitted regression line is:
A) Y = 136.72 29.34X
B) Y = 511.91 308.7X
C) Y = 511.91 30.87X
D) Y = -30.87 + 511.91X
PARAMETER
STD ERROR
T-VALUE
PR>T
INTERCEPT
511.91
70.3212
136.72
0.0052
DURATION
-30.87
14.35
-29.34
0.0038
Explanation / Answer
from above as intercept is 511.91 and duration (slope) is -30.87
hence C) Y = 511.91 30.87X is regression line equation
option C is correct
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