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Suggested Citation: "Appendix E Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records." Institute of Medicine. 2006. Noise and Military Service: Implications for Hearing Loss and Tinnitus. Washington, DC: The National Academies Press. doi: 10.17226/11443.

Appendix E
Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records

Chapter 6 reports the results of a review of service medical records to assess the availability of audiometric test records dating from a service member’s entry into and separation from military service. The analysis reported in Chapter 6 used a ±60-day window around entry and separation dates to determine the percentage of service medical records in which these audiometric records were present. To assess the effect of the ±60-day window, an alternative analysis was conducted using a ±120-day window. The results of that alternative analysis are shown below.

TABLE E-1 Percentages of Service Medical Records (95% Confidence Intervals) with Reports of Audiometric Examinations Within 120 Days of Entry into Active Duty (n = 3,212)

Branch	Before 1950	1950–1969	1970–Regulation Date	Regulation Date–1993	1994–2002
Army	1 (0–2)	10 (5–14)	45 (39–52)	42 (36–49)	54 (48–60)
Air Force	*	27 (17–37)	43 (36–50)	43 (37–50)	43 (36–50)
Marine Corps	0	17 (7–28)	48 (41–56)	62 (55–69)	76 (71–82)
Navy	1 (0–4)	11 (5–17)	48 (41–55)	66 (59–72)	76 (71–81)
*Fewer than 40 records in denominator. NOTE: The time periods reflect the era of the service member’s release from active duty.

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TABLE E-2 Percentages of Service Medical Records (95% Confidence Intervals) with Reports of Audiometric Examinations Within 120 Days of Release from Active Duty (n = 3,226)

Branch	Before 1950	1950–1969	1970–Regulation Date	Regulation Date–1993	1994–2002
Army	3 (0–6)	16 (10–21)	52 (45–59)	47 (40–54)	34 (28–40)
Air Force	*	41 (30–51)	49 (42–56)	38 (31–45)	17 (12–22)
Marine Corps	0	4 (0–9)	65 (57–72)	69 (62–76)	60 (54–66)
Navy	0	11 (5–17)	61 (54–68)	67 (61–74)	66 (61–72)
*Fewer than 40 records in the denominator.

TABLE E-3 Percentages of Service Medical Records (95% Confidence Intervals) with Reports of Audiometric Examinations Within 120 Days of Entrance into and Release from Active Duty (n = 3,210)

Branch	Before 1950	1950–1969	1970–Regulation Date	Regulation Date–1993	1994–2002
Army	1 (0–2)	7 (3–11)	28 (22–34)	22 (16–27)	19 (14–23)
Air Force	*	23 (14–33)	25 (19–31)	16 (11–21)	9 (5–13)
Marine Corps	0	2 (0–6)	38 (31–45)	44 (37–51)	51 (45–57)
Navy	0	2 (0–5)	33 (26–40)	46 (39–53)	52 (46–58)
*Fewer than 40 records in the denominator. NOTE: The time periods reflect the era of the service member’s release from active duty.

Noise and Military Service: Implications for Hearing Loss and Tinnitus (2006)

Chapter: Appendix E Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records

Appendix E
Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records

My Academies

Noise and Military Service: Implications for Hearing Loss and Tinnitus (2006)

Chapter: Appendix E Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records

Appendix E Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records

Appendix E
Results from Alternative Analyses of Data on Reports of Audiometric Testing in Service Medical Records