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Introduction Western militaries have consumption rates of alcohol and tobacco which are higher than the associated civilian populations, and are concerned about the negative effects on health, wellbeing, and military performance that such high rates may have. Materials and Methods A survey questionnaire which collected nonidentifiable data was distributed to all accessible members of an Australian Army Combat Brigade over the annual induction training and prefield exercise period between January and March 2019. The survey was composed of personal and demographic questions, followed by questions concerning the personal consumption habits of alcohol and tobacco. 1,606 complete and valid surveys were returned, representing 55.3% of the Brigade’s posted strength. Ethical clearance for this project was provided by the Australian Defence Force Joint Health Command Low Risk Ethics Panel (18-012). Results Almost one quarter of the Combat Brigade exceeded the Australian daily risk guideline for alcohol consumption, and over three quarters exceeded the occasion risk guideline; with 6.1% of soldiers drinking alcohol daily. 24.3% identified as tobacco smokers, with 15.9% smoking daily. Smoking rates and volumes were higher when deployed on field training exercises and on international training and operational deployments; as was the consumption of roll-your-own cigarettes. Overall, the main determinants of the negative consumption behaviors were gender (male) and age (under 25). Conclusions This study confirmed that the members of an Australian Army Combat Brigade have higher negative health consumption behaviors concerning alcohol and tobacco than the general civilian population. The results also identified a cohort of Senior Non-Commissioned Officers and Warrant Officers (E5–E9) between the ages of 35 and 44 who had high negative consumption behaviors which could result in poor health outcomes. This could be a suitable cohort for a targeted campaign to reduce tobacco and alcohol consumption and to assist to make healthy life changes.

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IntroductionRecent studies have shown an increasing number of overweight and obese members serving in many armies. Overweight and obesity can be estimated using either body mass index or waist circumference measures. The aim of this research was to estimate the proportion of the Australian Army considered to be overweight and obese by waist circumference using the proxy measure of issued combat uniform waist size.MethodThe Australian Army has been progressively replacing combat uniforms with a new uniform design and camouflage pattern since 2016. The total number of issued combat uniforms by size was obtained from the points of issue for the three Australian Army combat brigades from the first issue of the new uniform in January 2016 through to November 2019. The waist size of issued combat pants was collated from each of the three points of issue, adjusted for measured waist size accuracy and sex, and analysed to estimate the proportion of overweight and obese soldiers in the Australian Army.ResultsThere were a total of 155 735 combat pants issued across the three points of issue. The mean waist size based on combat uniform pant size was found to be 90.4 cm, with an SD of 7.5 cm. Based on these data, approximately 23.3% of the Australian Army population can be estimated to be overweight and an additional 4.5% to be obese.ConclusionsThe Australian Army, like many western armies, has a significant proportion of overweight personnel. This can negatively affect operational capability, health and future healthcare costs both within the military and to society after military service has concluded. This is the first study to use a uniform waist size as a proxy to estimate overweight and obesity. This technique has application for the military, emergency services or any other organisation in which uniforms are provided.