The population included workers in paint manufacturing that used solvents in combination with xylene and toluene. The researcher coordinated with all five paint manufacturers in the Eastern Region; however, responses were obtained from executives of two manufacturers to participate in the research. The determination of the sample size applied a sample-size formula that would allow use of multiple logistic regressions to find the factors that had an impact on health [24], and the calculation of the sample size resulted in 173 persons. The characteristics of the process in paint produc- tion are similar; thus the cluster sampling for two plants was selected for this study. Every worker who worked in a process related to solvent exposure was eligible as a study subject.