Question

Question 1

A researcher conducted a study to examine the association between having a central venous catheter and the risk of developing bloodstream infection (measured as infected vs. not infected). The results for this association show an odds ratio (OR) of 1.52 with a ^95%CI of (1.29 – 2.15). Thus you conclude that……………………………….

  

Question 2

A researcher conducted a study to examine the association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia (measured as VAP vs. no VAP). The results for this association show relative risk (RR) of .73 with a ^95%CI of (.46 – .85). Thus you conclude that……………………………….

Question 3

A researcher conducted a study to examine the association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia (measured as VAP vs. no VAP). The results for this association show relative risk (RR) of .73 with a ^95%CI of (.46 – 1.85). Thus you conclude that……………………………….

Question 4

A researcher team conducted a study to examine the association between continuous exposure to air pollutants and the risk of developing lung disease. They calculated their sample size based on assumed modest effect size (RR = 1.5), an alpha of 0.05 and 80% power. At the end of the study, the results suggested that there was no association between air pollution and lung disease (RR = 1.7; 95% CI 0.89 – 2.1). Shall these researchers be worried that they might have committed type II error in their conclusion? Explain your answer

Answer 1

Result:

Question 1

A researcher conducted a study to examine the association between having a central venous catheter and the risk of developing bloodstream infection (measured as infected vs. not infected). The results for this association show an odds ratio (OR) of 1.52 with a 95%CI of (1.29 – 2.15). Thus you conclude that significant association between having a central venous catheter and the risk of developing bloodstream infection. Having a central venous catheter have a risk of developing bloodstream infection 52% more than not having a central venous catheter.

  (95% OR not contains the value 1)

Question 2

A researcher conducted a study to examine the association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia (measured as VAP vs. no VAP). The results for this association show relative risk (RR) of .73 with a ^95%CI of (.46 – .85).

Thus you conclude that significant association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia. with oral care with Chlorhexidine Gluconate the risk of developing ventilator associated pneumonia is 27% ( 1-0.73)*100 )less compared to without oral care with Chlorhexidine Gluconate.

  (95% RR not contains the value 1)

Question 3

A researcher conducted a study to examine the association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia (measured as VAP vs. no VAP). The results for this association show relative risk (RR) of .73 with a ^95%CI of (.46 – 1.85). Thus you conclude that there is no association between oral care with Chlorhexidine Gluconate and the risk of developing ventilator associated pneumonia .

  (95% RR contains the value 1)

Question 4

A researcher team conducted a study to examine the association between continuous exposure to air pollutants and the risk of developing lung disease. They calculated their sample size based on assumed modest effect size (RR = 1.5), an alpha of 0.05 and 80% power. At the end of the study, the results suggested that there was no association between air pollution and lung disease (RR = 1.7; 95% CI 0.89 – 2.1). Shall these researchers be worried that they might have committed type II error in their conclusion? Explain your answer

  95% RR contains the value 1. The null hypothesis is not rejected.There fore there is reason that researchers be worried that they might have committed type II error in their conclusion.