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  • Title: TB surveillance in correctional institutions in Hong Kong, 1999-2005.
    Author: Wong MY, Leung CC, Tam CM, Kam KM, Ma CH, Au KF.
    Journal: Int J Tuberc Lung Dis; 2008 Jan; 12(1):93-8. PubMed ID: 18173884.
    Abstract:
    OBJECTIVE: To understand the epidemiology of tuberculosis (TB) inside the prison system of Hong Kong. METHOD: Prospective territory-wide TB surveillance was conducted among prisoners in 24 correctional institutions. RESULTS: From 1999 to 2005, 622 prevalent TB cases diagnosed before or within 3 months of incarceration and 214 incident cases diagnosed after 3 months were reported by prison staff to a paper-based central prison TB registry. Both crude prevalence and incidence were falling (chi(2) for trend, both P < 0.001), despite a higher sex- and age-adjusted prison TB incidence as compared to the general population (indirectly standardised rate [ISR] 280.6 vs. 108.0/100000, P < 0.001). Illegal immigrants (odds ratio [OR] 3.6, 95% confidence interval [CI] 1.8-7.4) and drug addicts (OR 2.04, 95%CI 1.13-3.7) were two major risk groups. The TB incident risk disappeared after their exclusion (ISR 117.1 vs. 108.0/100000, P = 0.52). No significant difference in the multidrug-resistant rate was found when comparing the group with the general population (3.5% vs. 1.0%, OR 3.6, 95%CI 0.5-28.4). No extensively drug-resistant (XDR) cases were identified. CONCLUSION: TB remains a significant disease in local prisons. Further strengthening of TB control programmes in prisons, especially targeting the higher risk groups, is recommended.
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