TC_Chapter_Problems_5

# TC_Chapter_Problems_5 - HLTH 501 WEEK 5 PROBLEMS30 POINTS...

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HLTH 501 W EEK 5 P ROBLEMS —30 POINTS 10 points per problem. Place answer in the following table: 1. A. R R ˆ 34 / 105 29 / 295 = 0.324 0.098 = 3.31 B. R O ˆ 0.324 /( 1 0.324 ) 0.098 /( 1 0.098 ) = 0.479 0.109 = 4.39 2. A. What is the expected CD4 count for a patient taking supplements who has had HIV for 2.5 years? Y ˆ = 501.41 + 12.67 (1) – 30.23 (2.5) = 438.51 75.575 B. What is the expected CD4 count for a patient not taking supplements who was diagnosed with HIV at study enrollment? Y ˆ = 501.41 + 12.67 (0) – 30.23 (0) Y ˆ = 501.41 + 0 - 0 = 501.41 C. What is the expected CD4 count for a patient not taking supplements who has had HIV for 2.5 years. Y ˆ = 501.41 + 12.67 (0) – 30.23 (2.5) Y ˆ = 501.41 + 0 - 75.575 = 425.84 3. A. What is the relative risk for hypertension in women 50+ years versus women < 50 years of age ? Page 1 of 4

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HLTH 501 R R ˆ = 255 / 492 241 / 1157 = 0.518 0.208 = 2.49 B. What is the relative risk for hypertension in men 50+ years versus men < 50 years of age? R R ˆ = 283 / 471 344 / 1062 = 0.601 0.324 = 1.85 1. A study is run to estimate the association between exposure to lead paint in childhood and attention-deficit hyperactivity disorder (ADHD). Data on n = 400 children are collected and data on exposure and ADHD diagnosis are shown below.
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