This question concerns a dataset containing information on 381 participants coll

Question

This question concerns a dataset containing information on 381 participants collected as part of a study in the Dominican Republic in 1997. The variables of interest include: sex; male (1) or female ( SBP: systolic blood pressure in mmHg: DBP: diastolic blood pressure in mmHg. The Stata results table below has some information missing. What can you conclude about the association between DBP and SBP controlling for sex? . regress SBP DBP ?.sex 381 303.97 0.0000 0.6166 Adj R-squared 0.6146 15.965 Source df MS Number of obs- F (2, 378) Model154950.444 2 77475.2221 Prob >F 378 254.877104 R-squared Residual 96343.5453 Total 251293.99 380 661.299972 Root MSE SBP Coef. Std. Err. p>It! [95% Conf. Interval] DBP 1.407657 0570968 sex Male -cons 1.012235 1.75057 14.1033 4.931852 0.58 0.563 2.86 0.004 4.406004 23.8006 o After controlling for sex, DBP is not significantly associated with SBP (p> 0.05) o After controlling for sex, DBP is significantly positively associated with SBP (p 0.001) o After controlling for sex, DBP is significantly positively associated with SBP (0.001 p 0.005). o Not enough information is provided to draw a conclusion.

Explanation / Answer

For DBP

t = coeff/ standard error = 1.407657/ 0.0570968 = 24.6539

P value for t = 24.6539 with 380 df is less than 0.001

That is p < 0.001

The result is significant

Therefore answer is :

After controlling for sex , dbp is significantly positively associated with sbp ( p< 0.001)

Note: since coefficient for dbp is positive, we can say positively associated

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