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= 511.91 - 30.87X

B: Y = -30.87 + 511.91X

C: Y = 511.91 - 308.7X

D: Y = 136.72 - 29.34X

Answer 1

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A regression analysis is performed relating CD4 count to the duration of HIV in years.

Output is given below :-

  

Parameter 511.91 30.87 STD Error 70.3212 14.35 T Value 136.72 29.34 PR> T 0.0052 0.0038 Intercept Duration

Therefore, the fitted regression line is,

Y = 511.91 - 30.87X

Answer :- option "A" is correct.