Abstract #300205

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JSM 2003 Abstract #300205
Activity Number: 82
Type: Contributed
Date/Time: Monday, August 4, 2003 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistical Consulting
Abstract - #300205
Title: A Meta-Analysis Approach to Estimating the Proportion of Airline Passengers Needing Supplemental Oxygen at Different Altitudes
Author(s): I-Li Lu*+
Companies: Boeing Phantom Works M&CT
Address: PO Box 3707-MS 7L-22, Seattle, WA, 98124-2207,
Keywords: heteroscedasticity ; weighted least squares ; prediction interval
Abstract:

Meta-analysis is a statistical technique that has long been used to synthesize information from independent studies. In a recent research study conducted by a Boeing epidemiologist (Muhm 2001), data were pooled from independent sources to estimate, at altitudes between sea level and 8,000 feet, what proportion of the passenger population experiences partial pressures of oxygen in arterial blood (PaO2) below 55 mm Hg. It is the purpose of this paper to use available information from existing literature to reestimate this proportion, thus establishing consistency and statistical support for Muhm's findings. We propose a simple model that uses published information and meta-analysis techniques to estimate the proportion. Our method provides a simple alternative to Muhm's and is easy to interpret. We compare our results with Muhm's and show that they are consistent when altitude is below 6,000 feet but diverge when it is above that level. We conclude with recommendations for future work suggested by this study.

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