9.13 Optional: Tests for ORs
(Answers available in Sect. A.9)
A study (Tanagawa and Shigematsu 1998) examined the choice of airway devices used for nontraumatic, out-of-hospital cardiac arrest patients, to evaluate the success and failure of insertion for various devices.
The data for success and failure at insertion is given in Table 9.5, taken from available patient documentation.
|Esophageal gastric tube airway (EGTA)||545||49|
|Laryngeal mask (LM)||2701||315|
Define \(p\) as the population proportion of successful attempts at insertion. Write the hypotheses to be tested.
Are the results likely to be statistically valid? Explain.
The study was designed to enable medics to choose the best airway device.
Would you recommend EGTA or LM? Why? Would you like any more information before making your choice? Explain.
Tanagawa, Koichi, and Aiko Shigematsu. 1998. “Choice of Airway Devices for 12,020 Cases of Nontraumatic Cardiac Arrest in Japan.” Prehospital Emergency Care 2: 96–100.