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Application of decision tree for prediction of cutaneous leishmaniasis incidence based on environmental and topographic factors in Isfahan Province, Iran

Roghieh Ramezankhani, Nooshin Sajjadi, Roya Nezakati Esmaeilzadeh, Seyed Ali Jozi, Mohammad Reza Shirzadi
  • Roghieh Ramezankhani
    Department of Environment, Tehran North Branch, Islamic Azad University, Tehran, Iran, Islamic Republic of
  • Nooshin Sajjadi
    Department of Environment, Tehran North Branch, Islamic Azad University, Tehran, Iran, Islamic Republic of | nooshinsadjadi@yahoo.com
  • Roya Nezakati Esmaeilzadeh
    Department of Environment, Tehran North Branch, Islamic Azad University, Tehran, Iran, Islamic Republic of
  • Seyed Ali Jozi
    Department of Environment, Tehran North Branch, Islamic Azad University, Tehran, Iran, Islamic Republic of
  • Mohammad Reza Shirzadi
    Communicable Diseases Management Center, Ministry of Health and Medical Education, Tehran, Iran, Islamic Republic of

Abstract

Cutaneous Leishmaniasis (CL) is a neglected tropical disease that continues to be a health problem in Iran. Nearly 350 million people are thought to be at risk. We investigated the impact of the environmental factors on CL incidence during the period 2007- 2015 in a known endemic area for this disease in Isfahan Province, Iran. After collecting data with regard to the climatic, topographic, vegetation coverage and CL cases in the study area, a decision tree model was built using the classification and regression tree algorithm. CL data for the years 2007 until 2012 were used for model construction and the data for the years 2013 until 2015 were used for testing the model. The Root Mean Square error and the correlation factor were used to evaluate the predictive performance of the decision tree model. We found that wind speeds less than 14 m/s, altitudes between 1234 and 1810 m above the mean sea level, vegetation coverage according to the normalized difference vegetation index (NDVI) less than 0.12, rainfall less than 1.6 mm and air temperatures higher than 30°C would correspond to a seasonal incidence of 163.28 per 100,000 persons, while if wind speed is less than 14 m/s, altitude less than 1,810 m and NDVI higher than 0.12, then the mean seasonal incidence of the disease would be 2.27 per 100,000 persons. Environmental factors were found to be important predictive variables for CL incidence and should be considered in surveillance and prevention programmes for CL control.

Keywords

Leishmaniasis; Decision tree; Environmental factors; Isfahan; Iran.

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Submitted: 2017-12-19 09:28:06
Published: 2018-05-08 11:00:37
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Copyright (c) 2018 Nooshin Sajjadi, Roghieh Ramezankhani, Roya Nezakatiesmaeilzadeh, Seyed Ali Jozi, Mohammad Reza Shirzadi

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