Application of the Proposed Draft American National Standard Method for Evaluating the Effectiveness of Hearing Conservation Programs
Technical rept. Feb 1992-Oct 1993
UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD
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This study describes the application of the Draft American National ANSI S12.13-1991 DANS method for evaluating the effectiveness of hearing conservation programs HCPs to audiometric data collected from civilian workers in the U.S. Army during 1968-1992. The DANS method was applied to two groups of workers those who met the DANS criteria for at least four consecutive tests Cohort-A4, and those having at least eight consecutive tests Cohort-A8. While 1.5 1,19382,195 of the original population qualified to enter Cohort- A4, only 0.3 26082,195 qualified for Cohort-A8. Within each group, the HCP for civilian workers in the Army was rated using four different procedures as applicable i.e., the Percent Worse Sequential, Percent Better or Worse Sequential, Standard Deviation for individual test frequencies, and Standard Deviation for averaged test frequencies. Where possible, data for men and women were analyzed separately. Each of the four procedures rated the HCP as marginal scale acceptable, marginal, unacceptable for both men and women. The implications of evaluating the effectiveness of an HCP on the basis of a very small proportion of the study population are discussed.
- Medicine and Medical Research
- Environmental Health and Safety