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In many radio-frequency identification (RFID) applications, one of the essential systematic functionalities is to quickly detect missing-tag event in case of misplacement or other incorrect operations. In this paper, we focus on probabilistically detecting the missing tags for the anonymous multicategory RFID systems without revealing the tag privacy. The main objective is to minimize the detection time while satisfying the required detection reliability of each category. First, we propose to use a multihash technique to sequentially detect the missing tags category-by-category, called segmented sequential detection approach, in which the frame segmentation is adopted to reduce the detection time. Then, we propose an enhanced segmented sequential detection approach to further improve the detection efficiency by deactivating the identified existing tags. We conduct extensive simulations to illustrate the effectiveness of our proposed two missing tag detection approaches. [ABSTRACT FROM AUTHOR]

Objective: People living with HIV (PLWH) may be at an increased risk for dementia as they age. Surprisingly, it remains unclear whether PLWH have a higher risk of developing dementia in late life than those without. We explored whether HIV-infection is associated with incident dementia diagnosis in older U.S. veterans accounting for potential confounders and competing risk of death., Methods: We included 1114 veterans diagnosed with HIV, ages at least 55 years (mean = 62 years, SD = 6), followed in the Veterans Health Administration healthcare system from 2004 to 2015, and a propensity-matched comparison group (n = 1114) without HIV. HIV and dementia diagnoses were determined using electronic medical records. Using Fine-Gray proportional hazards models, we examined whether HIV status was associated with a greater risk of incident dementia., Results: During follow-up (mean = 7 years, SD = 4 from date of HIV diagnosis), 5% of veteran PLWH developed dementia compared with 3% without (P = 0.01). Accounting for the competing risk of death and adjusted for demographics, substance use, education and income, PLWH remained 50% more likely to receive a dementia diagnosis [adjusted hazard ratio (aHR) = 1.50, 95% confidence interval 0.96-2.35]. Although combination antiretroviral therapy (cART) exposure was associated with an increased risk of incident dementia, this was driven by differences in illness severity as captured by CD4 cell count. There was no evidence of a differential effect by cART class., Conclusion: In a cohort of older USA veterans, HIV infection increased risk of dementia by 50%, while exposure to cART did not offset this risk. It is critical to understand the mechanisms by which HIV increases risk for developing dementia in later life.

Background: Recent attention has highlighted the common occurrence and health consequences of military sexual trauma (MST) in younger women veterans. However, almost nothing is known about MST in older veterans., Objective: To describe MST among older women veterans, including prevalence and common comorbidities., Design: Cross-sectional observational study, using data from national Department of Veterans Affairs medical records., Participants: Population-based sample of women Veterans aged 55+ with at least one documented MST screen response and at least one clinical encounter in fiscal years 2005-2015., Main Measures: MST screen: medical diagnoses (diabetes, hypertension, hyperlipidemia, myocardial infarction, cerebrovascular disease, congestive heart failure, obesity, chronic pain conditions, back pain, dementia, insomnia, sleep apnea, menopause symptoms) and mental health diagnoses (anxiety, depression, posttraumatic stress disorder, tobacco use, alcohol use disorder, substance use disorder, opioid use disorder, suicidal ideation) from International Classification of Diseases, Ninth Revision Clinical Modification codes in the medical record., Key Results: In this cohort of older women veterans (n = 70,864, mean age 65.8 ± 10.4 years), 13% had a positive MST screen. In multivariable regression analyses adjusted for age, race/ethnicity, and marital status, MST was strongly associated with most mental health diagnoses, particularly posttraumatic stress disorder (OR 7.25, 95% CI 6.84-7.68), depression (OR 2.39, 95% CI 2.28-2.50), and suicidal ideation (OR 2.42, 95% CI 2.08-2.82). MST was also associated with multiple medical conditions, particularly sleep disorders (insomnia OR 1.61, 95% CI 1.43-1.82; sleep apnea OR 1.48, 95% CI 1.37-1.61) and pain (chronic pain OR 1.58, 95% CI 1.50-1.67; back pain OR 1.40, 95% CI 1.34-1.47)., Conclusions: A history of MST is common among older women veterans and associated with a range of medical and mental health diagnoses. These findings call attention to the need for additional research in this understudied population, and the importance of trauma-informed care approaches for women across the lifespan.