Apply your knowledge about confidence intervals to Table 2, below. If the highli

Question

Apply your knowledge about confidence intervals to Table 2, below. If the highlighted section were presented as inferential tests the null hypotheses would be H0: IRR=1. Please fill in the blanks for the following:

a. The significance level for these tests would be alpha=_________, ___________-sided.

b. We would reject the null for _______________________________________________________. (e.g., Quartile 1, 2, 3, or 4)

c. The p-value would be > 0.05 for_____________________________________________________.

(e.g., Quartile 1, 2, 3, or 4)

d. The role-type classification for these relationships is C->C (2x2). For Quartile 4, the exposure is ____________________________________, and the levels of that variable are ________________________________________ and ___________________________________________.

e. The outcome is _______________________________________________________________ and the levels are ______________________________________ and ________________________________________.

Table 2-Everyday and Lifetime Racism Scores in 1997 and Asthma Incidence, BWHS, 1997-2011 Scores No. of Cases (Person-y) Age. and Pericd-Adjusted IRR (95% CI) Everyday racism score Quartile 1 Quartile 2 Quartile 3 152 (85,334) 283 (131,042) 329 (129,759) 304 (108,172) 1.00 (Ref) 23 (1.01-1.50) 1.48 (1.21-1.79) 1.68 (1.37-2.04) 1.00 (Ref) 9 (0.98-1 1.39 (1.14-1.69) P for trend .0001 ,0001

Explanation / Answer

a)

0.05, two sided

b)

quartile 3 and 4 (since the interval does not contain 1)

c)

quartile 1 and 2 (Since we are not rejecting the null hypothesis)

d)

Number of cases, age and period adjusted IRR, multivariable IRR

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