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Epidemiological features of pulmonary tuberculosis (PTB) patients complicated with diabetes in Guangzhou

Kuang Haobin,Chen Qichen,Li Huifen,Tan ShouyongGuangzhou Chest Hospital,Guangzhou 510095,China  
Objective To understand the epidemiological trends and features of PTB patients complicated with diabetes(TB-DM) in Guangzhou in order to provide evidence base for TB control strategies formulation. Methods Information of PTB patients registered from 2004 to 2008 in Yuexiu,Liwang,Haizhu and Tianhe district were analyzed. Results The total number of TB-DM in these four districts were 1 047 from 2004 to 2008,accounting for 6.2% of total PTB patients over the same periods,the 5-year average annual registration rate is 6.22/100 000,no significant changes within 5 years(P0.05). Male and female TB-DM accounted for 6.5% and 5.3% of PTB patients of same gender respectively(P0.01). The age of TB-DM ranged from 19 to 91 with a median of 59 years old,majority was middle-aged and elderly patients over 40 years old. Among TB-DM patients,632 (60.4%)cases were smear positive,415 cases smear negative (39.6%),527 cases with cavity 527 (50.3%). The proportion of patients with smear positive result and cavity in TB-DM cases were both significantly higher than tuberculosis cases without diabetes (P0.01). Patients discovery were mainly by outpatient attendance due to suspected symptoms,accounting for 89.2%. Conclusions The TB-DM incidence is relatively high,and mainly in middle-aged and elderly people,proportions of both smear positive and with cavity are high. All of these bring difficulties to TB control therefore there is a need to strengthen TB control work in this population.
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