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OCR for page 299
Noise and Military Service: Implications for Hearing Loss and Tinnitus
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.
OCR for page 300
Noise and Military Service: Implications for Hearing Loss and Tinnitus
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.
Representative terms from entire chapter:
neck surgery
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