Mazandaran University of Medical Sciences, Sari, Iran. ; Department of Biostatistics and Epidemiology, Faculty of Health, Kerman University of Medical Sciences, Kerman, Iran.
Neurology Research Center, Shafa Hospital, Kerman University of Medical Sciences, Kerman, Iran.
Int J Health Policy Manag. 2014 May 3;2(4):181-5. doi: 10.15171/ijhpm.2014.43. eCollection 2014 May.
There are few quantitative documents about the seasonal incidence of tuberculosis (TB) among immigrant populations. Concerning the significant role of recognizing seasonal changes of TB in improving the TB control program, this study determines the trend and seasonal temporal changes of TB among immigrants entering Iran.
In this longitudinal study, data from the Iranian TB register Program (from 2005 to 2011) was used. The aggregated number of monthly and seasonal TB cases was obtained by adding the daily counts. Data was analyzed by Chi-square, Independent T-test, ANOVA, and Poisson regression using Stata 11 and SPSS 20 software.
Among 74,155 registered patients with TB, 14.3% (10,587) were non-Iranian who had immigrated to Iran from 29 different countries. The highest aggregated number of seasonal and monthly incidence of TB in immigrants was observed in spring (2824, P= 0.007) and in May (1037, P< 0.001). The number of non-Iranian patients with TB increased significantly over the years (β= 0.016, P= 0.001).
This study shows that immigrants constitute a significant portion of TB patients recorded in Iran and this trend is increasing. Also, the peak incidence of this disease is the second month of the spring.
关于移民人群中结核病（TB）的季节性发病情况，定量研究文献较少。鉴于认识到结核病季节性变化对改善结核病控制规划的重要作用，本研究旨在确定进入伊朗的移民中结核病的趋势和季节性时间变化。
在这项纵向研究中，使用了伊朗结核病登记计划（2005 年至 2011 年）的数据。通过添加每日计数来获得每月和季节性结核病病例的总数。使用 Stata 11 和 SPSS 20 软件，通过卡方检验、独立 T 检验、方差分析和泊松回归对数据进行分析。
在登记的 74155 例结核病患者中，有 14.3%（10587 例）是非伊朗人，他们从 29 个不同的国家移民到伊朗。移民中季节性和每月结核病发病率最高的是春季（2824 例，P=0.007）和 5 月（1037 例，P<0.001）。非伊朗籍结核病患者的数量逐年显著增加（β=0.016，P=0.001）。
本研究表明，移民在伊朗记录的结核病患者中占很大比例，而且这一趋势还在增加。此外，这种疾病的发病高峰是春季的第二个月。
