Iranian Journal of War and Public Health

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Volume 15, Issue 4 (2023)                   Iran J War Public Health 2023, 15(4): 353-360 | Back to browse issues page

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Kiani R, Shahbazin S, Akbari M, Moudi M. Spatial Distribution Analysis of Chemical Warfare Victims with the Health Demographic Policy Approach. Iran J War Public Health 2023; 15 (4) :353-360
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1- Department of Population & Health, National Institute for Population Research, Tehran, Iran
2- Department of Migration, Urbanization & Spatial Distribution, National Institute for Population Research, Tehran, Iran
3- Shahid Beheshti University of Medical Sciences, Tehran, Iran
4- Janbazan Medical and Engineering Research Center (JMERC), Tehran, Iran
* Corresponding Author Address: Department of Population & Health, National Institute for Population Research, Shahid Beheshti Street, Tehran, Iran. Postal Code: 1531635711 (rezakiani@nipr.ac.ir)
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Introduction
Wars, whether directly or indirectly, expose societies to various phenomena [1] and pose a threat to public health [2], with potential consequences that may persist in society for years [3]. In 1980, approximately 20 months after the Islamic Revolution, Iraq attacked Iran [4], marking one of the most significant historical periods for Iran. Iraq's use of chemical weapons was a major health problem of this war [5-7].
Although the use of any chemical weapons in warfare is prohibited due to the significant threat to health [8-9], according to published evidence, Iraq's use of chemical weapons against Iran began in a limited manner shortly after the liberation of Khorramshahr. It expanded after the Valfajr 2, Valfajr 4, Kheybar, and Badr operations [10]. Iraq's use of such weapons was not confined to military and war zones; many residential and non-military areas also came under chemical attack [11]. A notable example of such an event is the attack on Sardasht city in the West Azerbaijan province, Iran, one of the provinces bordering Iraq, in the year 1986-1987 [12-14]. In this attack, the Iraqi army bombed Sardasht city with four 350-kilogram mustard gas bombs, resulting in the injury of over 4,500 residents of Sardasht [15]. It is essential to note that even before the war, the Iraqi army had used such weapons to kill Kurdish civilians in 1974 [10].
With more than 35 years having passed since the end of the war, the population of chemical war survivors is on the rise. Individuals in all provinces of the country who suffer from chemical injuries are facing various physical and psychological challenges. The long-term consequences of human exposure to chemical gases, such as mustard gas, can manifest over several decades [16-19]. In some sources, severe physical effects can occur between 20 to 50 years after exposure to chemical weapons [20]. Considering the legal duties of the Iranian government to support its citizens [21], awareness of the dispersion of the population of chemical war survivors among provinces is of particular importance for planning medical and welfare programs for these individuals. Given the specific health and medical service needs of this group, knowledge of the spatial distribution of this population and their places of residence can assist government officials, especially health planners and policymakers, in concentrating on specific geographical areas. On the one hand, considering the differences in the intensity and type of injuries and differences in health needs, this awareness significantly influences the allocation of health and medical budgets for various regions of the country. Planning for allocating hospitals and equipment, specialized medical practitioners, financial health aid, home-based medical services, etc., can be tailored based on the dispersion of the survivors according to their type of injuries. Therefore, this study aimed to assess the provincial dispersion status of Iranian chemical war survivors, whose injuries have been confirmed by the Medical Commission of the Foundation of Martyrs and Veterans Affairs. Also, this study aimed to show the concentration of the residence of survivors, primarily in which regions, and investigate the spatial distribution based on the type of injury.
Considering Iraq's widespread use of chemical weapons, even in non-military areas, and the presence of war soldiers from all parts of the country, the population of chemical war survivors is not concentrated in a single point or region. The goal of this research was to investigate the spatial distribution and provincial dispersion of the surviving population of the Iraq-Iran chemical war (with a focus on the injury type) and propose policy solutions to improve services for this group.

Instrument and Methods
This study was carried out in a descriptive-analytical manner using a secondary analysis method on the data of no-chemical and chemical war veterans provided by the General Directorate of Statistics and Information Technology of the Foundation of Martyrs and Veterans Affairs. The confirmation of war-related injuries and determination of the percentage of disability is the responsibility of the medical commissions of the Foundation of Martyrs and Veterans Affairs. This institution, recognized as a legal and scientific center, defines the type of injuries based on medical diagnoses, specifically focusing on respiratory, ocular, and dermatological issues related to chemical agents, particularly sulfur mustard gas. The data encompassing all war veterans (including disabled and non-disabled) of the Iraq-Iran war were extracted based on population size, place of residence, gender, and disability percentage. Subsequently, data related to chemical war survivors were extracted based on gender, place of residence, and type of injury. The extracted data were then analyzed in tables and charts, considering their frequency and provincial distribution in 2021-2022.
Descriptive statistical analysis was performed using SPSS 20 software. The overall spatial distribution of the population of chemical war survivors and their distribution by specific regions of injuries (eye, lung, and skin) were prepared using ArcGIS 10.8 software. The Moran I test was employed to confirm the significance of the spatial distribution.

Findings
The total population of war veterans and survivors in 2021-2022 was recorded as 644,735 individuals, comprising 601,330 (93.3%) disabled veterans and 43,405 (6.7%) non-disabled veterans. Among all disabled veterans, 350,859 individuals (58.3%) had injuries less than 25%, while 250,471 individuals (41.6%) had injuries exceeding 25%. Of the disabled veterans, 592,386 were male (98.5%) and 8,944 were female (1.5%). Chemical war survivors constituted 69,123 individuals (10.7%) of the total disabled veterans.
The provinces of South Khorasan and Hormozgan, with fewer than 500 chemical war veterans, had the lowest number. In contrast, Tehran and Isfahan provinces, with more than 5,000 chemical war veterans, had the highest incidence of chemical injuries (Figure 1).


Figure 1. Distribution of the population exposed to chemical warfare agents in the provinces of Iran in 2021-2022


Figure 2. Comparing number of the organs involved in the chemical warfare victims by province

The highest frequency of skin injuries (89.9%) among veterans was observed in clinically treated veterans, while the lowest percentage was attributed to severely affected veterans (0.2%). The highest proportion of veterans with severe skin issues was observed in Chaharmahal Bakhtiari provinces, while the lowest was found in Ardabil, Bushehr, and Hormozgan provinces. Regarding veterans with moderate skin problems, Ilam province had the highest ratio, and the lowest was in Bushehr and North Khorasan provinces. For veterans with mild skin injuries, West Azerbaijan province had the highest ratio, while the lowest was observed in Bushehr and Semnan provinces (Table 1).

Table 1. Frequency distribution of severity of the skin injuries in chemical warfare victims by province



The highest frequency of lung injuries among veterans, accounting for 49.6%, was observed in clinically treated veterans, while the lowest percentage was attributed to severe respiratory injuries (0.86%). The highest proportion of veterans with severe lung issues was found in West Azerbaijan province, and the lowest was in Kurdistan and Hormozgan provinces. Regarding veterans with moderate respiratory problems, Chaharmahal & Bakhtiari province had the highest ratio, and the lowest was in Bushehr and Gilan provinces. For veterans with mild respiratory injuries, Ilam province had the highest ratio, while the lowest was observed in Fars and South Khorasan provinces (Table 2).

Table 2. Frequency distribution of severity of the lung injuries in chemical warfare victims in the provinces of Iran



The highest frequency of eye injuries among veterans was observed in clinically treated veterans with 86.3%, while the lowest percentage was attributed to severe eye injuries (0.41%). The highest proportion of veterans with severe eye problems was found in Fars and Isfahan provinces, and the lowest was in Bushehr, South Khorasan, North Khorasan, and Sistan & Baluchestan provinces. Regarding veterans with moderate eye problems, Hormozgan province had the highest ratio, and the lowest was in Zanjan and Semnan provinces. For veterans with mild eye injuries, Hormozgan province had the highest ratio, while the lowest was in Kerman and Ilam provinces (Table 3).

Table 3. Frequency distribution of severity of the eye injuries in chemical warfare victims by province



Chemical veterans had a relatively uniform distribution across the country. The lowest number of chemical veterans in 2021-2022 was observed in the northwestern and southeastern regions of the country, while the central regions had the highest number of the veterans. Considering the impact of differences in the resident population in provincial centers, a more detailed examination of the spatial distribution of chemical veterans was conducted using the ratio index of veterans (per 10,000 population; Figure 3).


Figure 3. Spatial distribution of the number of Iranian chemical warfare victims

The spatial distribution of the chemical injury rate in the country was diverse, and the provincial dispersion of chemical veterans was concentrated in the central and western border regions (Figure 4).


Figure 4. Spatial distribution of the rate of Iranian chemical warfare victims (per 10,000 population) by province

The chemical injury rate in the country was 1.68 per 10,000 population, with a significant level of 0.09, indicating the presence of a cluster pattern in the distribution of chemical injury rates. However, the spatial distribution of the population in the country did not follow a cluster pattern. In other words, the distribution pattern of the population of chemical veterans did not resemble the population distribution pattern of the country (Figure 5).



Figure 5. General Moran's spatial autocorrelation test of dispersion pattern of the rate of chemical warfare victims by province

Discussion
This study aimed to investigate the spatial distribution and provincial dispersion of the surviving population of chemical veterans from the Iran-Iraq War (with a focus on the injury type) and to propose policy solutions to improve services for this group. According to a study in 2003-2004, during the years 1980 to 1988, Iran was subjected to chemical attacks 387 times, resulting in nearly 60,000 individuals suffering physical and psychological injuries from these attacks [22]. In another report, it is mentioned that over 100,000 individuals have been affected by chemical injuries [23-25]. With more than 30 years passing since the end of the war, the number of individuals recognized as chemical veterans by medical commissions is increasing, indicating a growing occurrence of consequences resulting from exposure to chemical weapons. If in 2015-2016, the number of chemical veterans reported was 63,417 (out of 554,990 individuals), this figure increased to 66,954 (out of 601,330 individuals) in 2021-2022. In other words, during this period, 3,537 individuals were added to the population of chemical veterans, confirmed by the Medical Commission of the Foundation of Martyrs and Veterans Affairs.
The concentration of chemical veterans and their residence in central regions or more developed areas is considerable considering the uneven distribution of development levels in the country and, consequently, the unequal distribution of facilities and services [26], especially healthcare facilities, and the needs of this segment of society for these facilities and services. Although there was no significant difference in the spatial pattern of chemical injury cases, which indicates the lack of significance in this spatial distribution, overall, the population of chemical veterans is higher in provinces with larger populations. Tehran, Khorasan Razavi, Isfahan, and Fars are the provinces with the highest population of chemical veterans. Additionally, western and southern provinces have more chemical veterans than eastern provinces.
The data include individuals identified by the Medical Commissions of the Foundation of Martyrs and Veterans Affairs as having chemical injuries. Individuals who did not meet the criteria for confirming chemical injury or lacked the necessary legal documentation were not included in the study, which can be considered a limitation of this research.
Given the importance of planning for the treatment of chemical injury survivors, one of the most crucial steps towards meeting the health needs of this population is the establishment of specialized healthcare centers or allocating a portion of specialized hospitals to address the urgent and vital needs of chemical injury survivors, especially in regions of the country that have experienced the highest number of injuries. Considering the impact of the type of injury on the demand for healthcare services, the distribution of facilities and specialized physicians should be based on the dispersion of chemical injury cases by injury type. Alongside these practical measures, these initiatives' excessive medical and healthcare costs must also be considered, so an annual budget allocation for these services should be considered for each region.
Considering the long-term consequences of some types of injuries, comprehensive community identification and screening measures should be a priority to prevent acute and severe cases before the intensity of the injury occurs. In addition to healthcare needs, cultural and social issues, and appropriate interventions are also important. Given the physical and behavioral limitations of some types of injuries, some chemical injury survivors cannot participate in public places and many recreational centers. Considering the importance of leisure time and social participation in the lives of these individuals, cultural and social programs suitable for the physical conditions of this group of war-injured survivors should be considered. The programs should be planned according to each region's social and cultural context. To implement these measures, attention should be paid to the location and appropriateness of the physical conditions of chemical injury survivors. Therefore, in addition to providing these programs with suitable spaces, attention should be paid to adapting public spaces for the presence of chemical injury survivors.

Conclusion
The repercussions of Iraq's use of chemical weapons are evident in all provinces of Iran, and individuals with chemical injuries are present in all provinces. Tehran, Isfahan, Khorasan Razavi, Kerman, West Azerbaijan, and Khuzestan provinces have the highest number of chemical injury survivors.

Acknowledgment: The authors thank the management and Veterans Engineering and Medical Sciences Research Center members for providing the necessary information and data.
Ethical Permissions: The data were obtained from the Statistics and Information Technology Department of the Foundation of Martyrs and Veterans Affairs, and the study was conducted without revealing the names and identities of individuals, relying solely on aggregated regional and provincial data.
Conflicts of Interests: According to the authors, no conflict of interest exists.
Authors’ Contribution: Kiani R (First Author), Main Researcher/Introduction Writer/Discussion Writer (50%); Shahbazin S (Second Author), Methodologist/Statistical Analyst (20%); Akbari ME (Third Author), Methodologist/Discussion Writer (20%); Moudi M (Fourth Author), Methodologist/Discussion Writer (10%)
Funding/Support: This study is part of a research project financially and morally supported by the Janbazan Medical and Engineering Research Center affiliated with the Foundation of Martyrs and Veterans Affairs.
Keywords:

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