Analytical Performance Criteria

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ACKNOWLEDGMENTS

The authors gratefully acknowledge the significant collaboration of Kelly Howard and Dan Leiner for this work. Data collection support from James Couch, Brian Curwin, Chad Dowell, Kevin L Dunn, Alan Echt, Alberto Garcia, and Denise Giglio is appreciated as is the field guidance from Donald Booher, Karl Feldman, and Dan Farwick.

The findings and conclusions in this manuscript are those of the author(s) and do not necessarily represent the views of the National Institute for Occupational Safety and Health.

Mention of company names or products does not constitute endorsement by the Centers for Disease Control and Prevention.

Notes

^A During Surveys 1 and 2, acetoin samples were analyzed only by the NIOSH method.

^A P-values were calculated according to Signed Rank test comparing median difference between method results.

^A P-values were calculated according to Spearman correlation.