1.Spatiotemporal clustering of cutaneous leishmaniasis in Fars province,Iran
Zare MARJAN ; Rezaianzadeh ABBAS ; Tabatabaee HAMIDREZA ; Aliakbarpoor MOHSEN ; Faramarzi HOSSEIN ; Ebrahimi MOSTAFA
Asian Pacific Journal of Tropical Biomedicine 2017;7(10):862-869
Objective: To assess the spatiotemporal trait of cutaneous leishmaniasis (CL) in Fars province, Iran. Methods: Spatiotemporal cluster analysis was conducted retrospectively to find spatio-temporal clusters of CL cases.Time-series data were recorded from 29 201 cases in Fars province,Iran from 2010 to 2015,which were used to verify if the cases were distributed randomly over time and place. Then, subgroup analysis was applied to find significant sub-clusters within large clusters.Spatiotemporal permutation scans statistics in addition to subgroup analysis were implemented using SaTScan software. Results: This study resulted in statistically significant spatiotemporal clusters of CL (P<0.05).The most likely cluster contained 350 cases from 1 July 2010 to 30 November 2010. Besides, 5 secondary clusters were detected in different periods of time. Finally, statistically significant sub-clusters were found within the three large clusters(P<0.05). Conclusions: Transmission of CL followed spatiotemporal pattern in Fars province, Iran.This can have an important effect on future studies on prediction and prevention of CL.
2. Spatiotemporal clustering of cutaneous leishmaniasis in Fars province, Iran
Marjan ZARE ; Abbas REZAIANZADEH ; Hamidreza TABATABAEE ; Mohsen ALIAKBARPOOR ; Hossein FARAMARZI ; Mostafa EBRAHIMI
Asian Pacific Journal of Tropical Biomedicine 2017;7(10):862-869
Objective To assess the spatiotemporal trait of cutaneous leishmaniasis (CL) in Fars province, Iran. Methods Spatiotemporal cluster analysis was conducted retrospectively to find spatiotemporal clusters of CL cases. Time-series data were recorded from 29 201 cases in Fars province, Iran from 2010 to 2015, which were used to verify if the cases were distributed randomly over time and place. Then, subgroup analysis was applied to find significant sub-clusters within large clusters. Spatiotemporal permutation scans statistics in addition to subgroup analysis were implemented using SaTScan software. Results This study resulted in statistically significant spatiotemporal clusters of CL (P < 0.05). The most likely cluster contained 350 cases from 1 July 2010 to 30 November 2010. Besides, 5 secondary clusters were detected in different periods of time. Finally, statistically significant sub-clusters were found within the three large clusters (P < 0.05). Conclusions Transmission of CL followed spatiotemporal pattern in Fars province, Iran. This can have an important effect on future studies on prediction and prevention of CL.
3. Forecasting the number of zoonotic cutaneous leishmaniasis cases in south of Fars province, Iran using seasonal ARIMA time series method
Mehdi SHARAFI ; Haleh GHAEM ; Hamid Reza TABATABAEE ; Hossein FARAMARZI
Asian Pacific Journal of Tropical Medicine 2017;10(1):79-86
Objective To predict the trend of cutaneous leishmaniasis and assess the relationship between the disease trend and weather variables in south of Fars province using Seasonal Autoregressive Integrated Moving Average (SARIMA) model. Methods The trend of cutaneous leishmaniasis was predicted using Mini tab software and SARIMA model. Besides, information about the disease and weather conditions was collected monthly based on time series design during January 2010 to March 2016. Moreover, various SARIMA models were assessed and the best one was selected. Then, the model's fitness was evaluated based on normality of the residuals’ distribution, correspondence between the fitted and real amounts, and calculation of Akaike Information Criteria (AIC) and Bayesian Information Criteria (BIC). Results The study results indicated that SARIMA model (4,1,4)(0,1,0)