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. 2015 Dec 2;5(12):e008591. doi: 10.1136/bmjopen-2015-008591

Table 1.

Demographic and military characteristics of the study subset (weighted N=5337; sample n=508) and their unadjusted association with medically related attrition

Medical release
Characteristic Unweighted
Sample number
Weighted (%) Per cent 95% CI Unadjusted HR 95% CI
Occupation categorisation*
 FS 12 2.7 54.8 24.4 to 85.3 5.36a 2.21 to 12.98
 HS 28 4.8 12.6 0.9 to 24.3 0.76 0.26 to 2.26
 IM 31 4.8 18.2 5.0 to 31.5 0.79 0.32 to 2.00
 ISR 22 3.5 21.3 4.2 to 38.5 1.29 0.57 to 2.92
 OPS Support 96 15.4 29.9 19.0 to 40.8 1.75c 0.98 to 3.12
 OPS Tech 58 16.0 21.2 9.3 to 33.1 0.81 0.36 to 1.80
 Specialist 34 6.8 15.7 2.7 to 28.6 0.86 0.34 to 2.18
 OPS 227 46.0 18.6 12.7 to 24.5 Reference Reference
Occupation categorisation (aggregated)*
 FS 12 2.7 54.8 24.4 to 85.3 5.75a 2.46 to 13.46
 OPS Support 96 15.4 29.9 19.0 to 40.8 1.88b 1.11 to 3.20
 Other 400 81.9 18.6 14.2 to 23.0 Reference Reference
Component
 Reserve Forces 23 6.7 12.7 0 to 28.7 0.68 0.16 to 2.81
 Regular Forces 485 93.3 21.9 17.6 to 26.2 Reference Reference
Element*
 Air Force 66 12.9 26.9 13.9 to 39.9 2.21c 0.94 to 5.22
 Navy 65 21.0 17.4 7.3 to 27.5 Reference Reference
 Army 377 66.1 21.5 16.8 to 26.2 1.84c 0.95 to 3.57
Rank*
 Officer 48 10.4 4.9 0 to 9.8 Reference Reference
 SNCM 130 24.8 25.4 16.3 to 34.5 6.10a 1.92 to 19.33
 JNCM 330 64.7 22.4 17.2 to 27.6 4.63a  1.51 to 14.17
Sex
 Female 62 9.8 25.2 14.5 to 36.0 1.25 0.74 to 2.11
 Male 446 90.2 20.9 16.4 to 25.4 Reference Reference
Age*
 ≤29 140 27.9 11.2 5.5 to 16.8 Reference Reference
 30–39 234 44.5 24.7 18.3 to 31.1 1.85c 0.98 to 3.47
 ≥40 134 27.6 26.1 17.4 to 34.8 2.38b 1.20 to 4.72
Years of service*
 ≤9 214 43.1 16.3 10.7 to 22.0 Reference Reference
 10–19 194 35.5 24.6 17.5 to 31.6 1.42 0.86 to 2.35
 ≥20 100 21.4 26.0 16.0 to 35.9 1.84b 1.01 to 3.37
Marital status (MI)†
 Married 350 68.7 23.1 17.8 to 28.3 Reference Reference
 Single—never married 100 20.0 14.5 7.5 to 21.4 0.58c 0.32 to 1.06
 Divorced/widowed/separated 49 9.7 17.5 5.9 to 29.1
 Unspecified 9 1.6 55.3 18.7 to 92.0 0.70 0.33 to 1.49
Live-in dependents (MI)*,
 Yes 232 42.8 27.3 20.4 to 34.2 1.61b 1.03 to 2.53
 No 246 50.8 16.5 11.4 to 21.6 Reference Reference
 Unspecified 30 6.4 19.5 3.5 to 35.5

Otherwise, p>0.15.

*The Wald test p value was less than 0.15 for variables: occupation categorisation, element, rank, age, years of service and live-in dependents (MI).

†MI was used to compute the unadjusted HR for variables: marital status (MI) and live-in dependents (MI).

ap≤0.01.

bp≤0.05.

cp≤0.1.

dp≤0.15.

FS, facility support; HS, health services; IM, information management; ISR, intelligence, surveillance and reconnaissance; JNCM, junior non-commissioned member; MI, multiple imputation used; OPS Support, operations support; OPS Tech, operations technicians; OPS, operations; SNCM, senior non-commissioned member.