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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

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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.

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.
×

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.

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.
×
Page 299
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.
×
Page 300
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The Institute of Medicine carried out a study mandated by Congress and sponsored by the Department of Veterans Affairs to provide an assessment of several issues related to noise-induced hearing loss and tinnitus associated with service in the Armed Forces since World War II. The resulting book, Noise and Military Service: Implications for Hearing Loss and Tinnitus, presents findings on the presence of hazardous noise in military settings, levels of noise exposure necessary to cause hearing loss or tinnitus, risk factors for noise-induced hearing loss and tinnitus, the timing of the effects of noise exposure on hearing, and the adequacy of military hearing conservation programs and audiometric testing. The book stresses the importance of conducting hearing tests (audiograms) at the beginning and end of military service for all military personnel and recommends several steps aimed at improving the military services’ prevention of and surveillance for hearing loss and tinnitus. The book also identifies research needs, emphasizing topics specifically related to military service.

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