Search

Study designDescriptive study.ObjectivesThe aim of this manuscript is to describe the development process of the data set for the National Spinal Cord Injury Registry of Iran (NSCIR-IR).SettingSCI community in Iran.MethodsThe NSCIR-IR data set was developed in 8 months, from March 2015 to October 2015. An expert panel of 14 members was formed. After a review of data sets of similar registries in developed countries, the selection and modification of the basic framework were performed over 16 meetings, based on the objectives and feasibility of the registry.ResultsThe final version of the data set was composed of 376 data elements including sociodemographic, hospital admission, injury incidence, prehospital procedures, emergency department visit, medical history, vertebral injury, spinal cord injury details, interventions, complications, and discharge data. It also includes 163 components of the International Standards for the Neurologic Classification of Spinal Cord Injury (ISNCSCI) and 65 data elements related to quality of life, pressure ulcers, pain, and spasticity.ConclusionThe NSCIR-IR data set was developed in order to meet the quality improvement objectives of the registry. The process was centered around choosing the data elements assessing care provided to individuals in the acute and chronic phases of SCI in hospital settings. The International Spinal Cord Injury Data Set was selected as a basic framework, helped by comparison with data from other countries. Expert panel modifications facilitated the implementation of the registry process with the current clinical workflow in hospitals.

Objective: During the past few decades, many scoring systems have been developed to evaluate the severity of injury and predict the outcome in trauma patients. This study aimed to assess the capacity of three common trauma scoring systems: injury severity score (ISS), Glasgow coma scale (GCS), and revised trauma score (RTS) in predicting in-hospital mortality and ICU admission in patients with traumatic injury. Methods: This is a multicenter study of the hospital-based national trauma registry of Iran (NTRI), an ongoing registry-based trauma database. This study included trauma cases from 12 major trauma centers throughout the country admitted between July 2016 and November 2023. The inclusion criteria were all patients admitted to the emergency department due to trauma, hospitalized for at least 24 hours, deceased within the first 24 hours of admission, and patients transferred from the intensive care unit (ICU)s of other hospitals. Results: A total of 50,458 traumatic patients, with 38,740 (76.9%) being male, were included in this study. After adjustment for confounders, head, face, and neck injuries were associated with the highest odds of death (OR: 7.51, P-value<0.001), whereas abdominal injuries were associated with the highest odds of ICU admission (OR: 4.58, P-value<0.001). Each Unit increase in RTS score was accompanied by a 61% decrease in odds of death (OR: 0.39, P-value<0.001). The area under the ROC curve for predicting in-hospital mortality was 0.81 (0.79 to 0.82) in ISS, 0.78 (0.77 to 0.80) in GCS, and 0.75 (0.73 to 0.76) in RTS. There was a significant difference between RTS and GCS, aswell as RTS and ISS for in-hospital mortality prediction (P-values< 0.001). The area under the ROC curve for the prediction of ICU admission was 0.75 (0.74 to 0.75) in ISS, 0.63 (0.62 to 0.63) in GCS, and 0.62 (0.61 to 0.63) in RTS. There was a statistically significant difference between ISS and GCS, as well as ISS and RTS, for ICU admission prediction (P-value<0.001). Conclusion: ISS is the best predictor of in-hospital mortality and ICU admission, compared to GCS and RTS. [ABSTRACT FROM AUTHOR]

Objective: The main objective of this study was to determine various characteristics and outcomes of self-harm and suicide in men and women with data obtained from the National Trauma Registry of Iran (NTRI). Method: This retrospective multicenter study using data from the NTRI included all patients who went to the emergency department (ED) due to self-harm and suicide, considering the NTRI's specific inclusion criteria, from September 2016 to January 2023. We evaluated patients regarding demographics and clinical characteristics, various outcomes, and factors influencing in-hospital death. Statistical analyses were conducted using the STATA software version 15.0. The chisquare test was used to compare the distribution of variables between men and women. Also, the logistic regression models were applied to assess the predictors of in-hospital death. Results: Self-harm and suicide cases were gathered from eleven geographically diverse hospitals across the country, and our study included 511 men and 347 women out of 50,661 registered trauma cases. Among them, 443 men (86.7%) and 267 women (76.9%) were between 18 and 49 years old (P < 0.001). Single women constituted 130 (37.3%) of the female cases, while single men were 313 (61.6%) of the male cases (P < 0.001). The three most common methods among our patients were poisoning with 234 (45.8%) of men and 245 (70.6%) of women cases, stab/cut with 208 (40.7%) of men and 54 (15.6%) of women cases, and fall with 16 (3.1%) of men and 26 (7.5%) of women cases (P < 0.001). The risk of death in patients with a Glasgow Coma Scale (GCS) score of 3 to 8 was 46.22 (95% CI = 18.66 to 114.45) times more than patients with a GCS score of 13 to 15. Conclusion: Data on self-harm and suicide traumatology were gathered from eleven hospitals in Iran. Our findings indicated differences in the distribution of age and marital status between genders. Moreover, both genders used similar methods for self-harm and suicide, and gender did not affect the outcome. [ABSTRACT FROM AUTHOR]

Objective: Trauma is one of the major causes of mortality and morbidity globally. The current study aimed to improve the understanding of characteristics, severity of injuries and outcomes of trauma patients admitted to Imam Khomeini Hospital, Urmia, Iran. Methods: Data were obtained from the trauma registry of Imam Khomeini Hospital, a level 1 trauma referral center, for all patients admitted to the center from17 september 2016 to 21 January 2023. Patients' demographics, injury mechanisms, and patients' outcomes were analyzed. Results: The emergency department attended to 5555 trauma patients. The gender distribution was with 3998 (71.9%) males and 1557 (29.1%) females. Patients' age ranged from 1 to 101 years, with a mean±standard deviation (SD) of 33.1 (±20.7) years. Road traffic accidents followed by falls were the most common causes of traumas reported in 2138 (38.5%) and 1298 (23.4%) trauma patients, respectively. The in-hospital mortality rate was 0.9% (53 patients). The mean (±SD) age of death was 43.5 (±22.4) years. 569 (10.2%) patients were admitted to the intensive care unit (ICU). The univariable logistic regression models showed that there were significant associations between age (P<0.001), Glasgow coma scale (GCS) (P<0.001), injury severity score (ISS) (P<0.001), and mechanical ventilation (P<0.001) as independent variables and death outcome. The univariable and multiple logistic regression analyses showed statistically significant associations between age, cause of trauma, ISS, GCS and body site injury with ICU admission. The odds of ICU admission in patients after being adjusted for age, ISS, GCS, cause of trauma and type of transportation was 1.73 times higher in head, face, and neck injuries compared to limb injuries. (adjusted OR: 1.73, [95% CI: 1.23,2.42]; P<0.01). Conclusion: Older age, low GCS, higher ISS and mechanical ventilation were associated with higher mortality. Older age, higher ISS, lower GCS, body site injury, type of transportation, and cause of traumawere all significant independent predictors of ICU admission. [ABSTRACT FROM AUTHOR]

Background: According to the reports, the road traffic injuries (RTI) mortality rate in Iran as a middle-income country in the Eastern Mediterranean Region (EMR) decreased in past decades but is higher than the global level and remained a health problem. Objectives: This study aimed to report the characteristics of registered patients injured by different trauma mechanisms in Yazd City, Iran. Methods: In this study, the patients were registered from September 28, 2016, to December 31, 2022, at Shahid Rahnamoon Hospital, affiliated with the National Trauma Registry of Iran (NTRI) for its first phase. Inclusion criteria were hospital length of stay (LOS) of more than 24 hours, death due to injury in the hospital, or transfer from other hospitals' intensive care units (ICU). Age, gender, Glasgow Coma Scale (GCS), systolic blood pressure (SBP), cause of injury, LOS, injury severity score (ISS), and in-hospital mortality were assessed. Results: Among 3960 participants, 2307 (58.2%) patients were injured due to RTI as the most common cause of injury. Also, 949 (23.9%) and 359 (9.1%) of the participants experienced fall and stab/cut injuries, respectively. Men were affected more than women in all injury causes (p<0.001). In those with RTI, multiple trauma (55.3%) was the most prevalent event, and then extremities (23.5%) were the most body regions injured (p<0.001). Also, in people who fell, trauma to the extremities (35.4%) was higher than in other regions (p<0.001). According to the adjusted logistic regression model, being ≥65 years old has a 1.9 times higher chance of ICU admission compared to being<18 years old. Also, having ISS≥9, having GCS≤12, and having trauma to the head/neck/face, abdomen, spine and multiple trauma had a statistically significant association with the chance of ICU admission with odds ratios (OR) and 95% confidence intervals (CI) of 3.89 (2.49-6.08), 22.26 (10.54-47.02), 2.55 (1.33-4.88), and 4.40 (3.00-6.47), respectively. Conclusion: Data from the first phase of the only trauma registry center in Yazd province showed that RTI was the most common cause of injury, which was more prevalent among men. People aged 18 to 64 were significantly more affected by all injury causes. After multiple trauma, RTIs and fall injuries were mainly involved in the head and extremities. People must be warned against the potential risks and complications of trauma, especially RTI, more than before. [ABSTRACT FROM AUTHOR]

Background: Road traffic accidents (RTAs) are the leading cause of death for children and young adults aged 5 to 39 and the third-leading cause of death in Iran. Objectives: The aim of this study was to assess in-hospital costs of patients following RTAs and identify associated factors among the patients admitted to Sina Hospital, a collaborating hospital with the National Trauma Registry of Iran (NTRI). Methods: A hospital-based registry study was conducted between September 17, 2016, and April 30, 2022, involving 3245 patients affected by RTAs. Data collection utilized the NTRI minimum dataset. To assess the factors influencing in-hospital costs of RTAs, various statistical analyses were performed, including independent sample t-tests, one-way ANOVA, and multiple linear regression analysis. Results: The distribution of studied subjects based on sex, age, and road user group revealed that the majority were male (91%), within the working age range of 21-60 years (78.2%), and motorcyclists (55.2%). The mean in-hospital cost per patient following RTAs was 152.3 million Iranian Rial (IRR) ($609.35). In the multiple linear regression analysis, several factors were significantly associated with higher in-hospital costs (ps<0.05). These factors included undergoing surgery, admission to the intensive care unit (ICU), the year of admission, having a moderate injury severity, being a car occupant, being female, and having a longer length of stay (LOS) at the hospital. Patients who required surgery had an additional cost of 102 million IRR, while those admitted to the ICU had an additional charge of 43.4 million IRR (ps<0.001). Conclusions: The study findings revealed that in-hospital costs resulting from RTAs were influenced by factors such as gender, injury severity, road user group, ICU admission, surgery operation, and LOS at the hospital. The mean in-hospital costs per patient were relatively high, amounting to 152.3 million IRR ($609.35). These findings highlight the need for increased efforts to mitigate the burden of RTAs in the country and implement measures to reduce their occurrence. [ABSTRACT FROM AUTHOR]

Background: There are many debates on socioeconomic indicators influencing trauma outcomes. Objectives: This study aimed to determine the association between education as a socioeconomic indicator and trauma outcomes. Methods: This descriptive-analytical study was conducted on 30,448 trauma patients during 2016-2021. The data were based on the minimum dataset of the National Trauma Registry of Iran (NTRI) from six different trauma centers in various cities of the country. The variables used in this study included age, education level, marital status, cause of injury, Glasgow Coma Scale (GCS), intensive care unit (ICU) admission, Injury Severity Score (ISS), and in-hospital mortality. Logistic regression was used to investigate the association between independent variables and trauma outcomes. Results: The study included 30,448 trauma patients with male predominance (75.8%). The mean age was 36.9 years. The most frequent education level was secondary education, with 14,228 (46.6%). Education levels had significant relationships with ISS, death, and ICU admission (P<0.001). Moreover, after applying the multiple logistic regression, the odds of deaths for trauma patients with no formal, primary, and secondary education levels were 3.36, 5.03, and 3.65 times, respectively, more than the odds of deaths at the higher education level after controlling for other factors (all Ps<0.05). However, there were no such relationships between education levels and the odds of ICU admission. Conclusion: Findings of the present study showed a significant association between the education levels and trauma outcomes. Adjusted for other covariates, the chance of death for trauma patients with no formal, primary, or secondary education levels was higher than that at the higher education level. [ABSTRACT FROM AUTHOR]

Background and Objectives: Trauma is a prominent reason for morbidity and death in Iran. The objective of this study was to provide epidemiological and clinical features of the injured patients admitted to one of the collaborating centers of the national trauma registry of Iran (NTRI). Materials and Methods: The study was carried out at the one NTRI center from March 25, 2017, to November 20, 2020. Patients who had the NTRI criteria were included in the study. Data comprised demographics, injury information, prehospital and in-hospital information, procedures, International Classification of Diseases 10 codes, diagnoses, injury severity, and outcomes. Results: Overall, 4043 trauma patients were included in the trauma. Of whom, 3036 (75.0%) were men. There was a statistically significant association between the cause of trauma and the severity of the injury. The post hoc test results demonstrated that the percentage of the injury severity score (ISS) ≥9 in patients with falls was higher than in patients with road traffic injuries (RTI) (26.9% vs. 16.8%, P = 0.01). The univariable and multiple logistic regression analyses showed statistically significant associations between age ≥65, cause of trauma, years of school, and ISS ≥9 with intensive care units (ICU) admission. After adjusting for age and cause of trauma, the odds of ICU admission in patients with ISS ≥9 were 6.23 times more than in patients with ISS <9 (odds ratio = 6.23, 95% confidence interval [4.92--7.88]). Conclusion: The odds of ICU admission were higher in older patients (age ≥65), lower educated patients, patients with falling, and severe injuries. [ABSTRACT FROM AUTHOR]

Interpersonal violence (IPV) is a major public health concern with a significant impact on physical and mental health. This study was designed to evaluate age–sex-specific IPV mortality trends and the assault mechanisms (firearm, sharp objects, and other means), at national and provincial levels, in Iran. We used the Iranian Death Registration System (DRS) and the population and housing censuses in this analysis. Spatio-temporal and Gaussian Process Regression methods were used to adjust for inconsistencies at the provincial level and to integrate data from various sources. After assessing their validity, all records were reclassified according to the International Classification of Diseases, 10th Revision (ICD-10). All ICD-10 codes were then mapped to Global Burden of Disease (GBD) 2013 coding. More than 700 individuals died due to IPV in 1990 and more than twice this number in 2015. The IPV mortality age-standardized rate, per 100,000, increased from 1.62 (95% Uncertainty Interval [UI] = [0.96, 2.75]) in 1990 to 1.81 [1.15, 2.89] in 2015. Among females, the age-standardized mortality rate at national level per 100,000 due to IPV was 1.27 [0.66, 2.43] in 1990 and decreased to 1.08 [0.60, 1.96] in 2015. Among males, the age-standardized mortality rate was 1.96 [1.25, 3.09] in 1990 rising to 2.54 [1.70, 3.82] in 2015. Data from provinces revealed that during the period of our study, Hormozgan province had the largest increase of IPV among females, and Fars province had the largest increase of IPV among males. Conversely, the largest decrease was detected in West Azarbaijan and Qom provinces in females and males, respectively. This study showed a wide variation in the incidence and trends of IPV in Iran by age, sex, and location. The study has provided valuable information to reduce the burden of IPV in Iran and a means to monitor future progress through repeated analyses of the trends. [ABSTRACT FROM AUTHOR]

Background: Spinal cord injury (SCI) is one of the most disabling consequences of trauma with unparalleled economic, social, and personal burden. Any attempt aimed at improving quality of care should be based on comprehensive and reliable data. This pilot investigation studied the feasibility of implementing the National Spinal Cord and Column Injury Registry of Iran (NSCIR-IR) and scrutinized the quality ofthe registered data. Methods: From October 2015 to May 2016, over an 8-month period, 65 eligible trauma patients who were admitted to hospitals in three academic centers in mainland Iran were included in this pilot study. Certified registered nurses and neurosurgeons were in charge of data collection, quality verification, and registration. Results: Sixty-five patients with vertebral column fracture dislocations were registered in the study, of whom 14 (21.5%) patients had evidence of SCI. Mechanisms of injury included mechanical falls in 30 patients (46.2%) and motor vehicle accidents in 29 (44.6%). The case identification rate i.e. clinical and radiographic confirmation of spine and SCI, ranged from 10.0% to 88.9% in different registry centers. The completion rate of all data itemswas 100%, except forfive data elements in patientswho could not provide clinical information because of their medical status. Consistency i.e. identification of the same elements by all the registrars, was 100% and accuracy of identification of the same pathology ranged from 66.6% to 100%. Conclusions: Our pilot study showed both the feasibility and acceptable data quality of the NSCIR-IR. However, effective and successful implementation of NSCIR-IR data use requires some modifications such as presence of a dedicated registrar in each center, verification of data by a neurosurgeon, and continuous assessment of patients' neurological status and complications. [ABSTRACT FROM AUTHOR]

Background: The main objective was to describe the results of the pilot phase of the national trauma registry of Iran (NTRI) at a referral university trauma center in Tehran. Methods: The study was performed at Sina Hospital in Tehran, Iran from August 1 to September 30, 2016. Patients who had the NTRI criteria were included. 109 data variables were analyzed including demographics, medical care information, injury characteristics, and outcomes. Results: Over 2 months, 171 patients, predominantly males (87.1%) with an average age of 37.2 (±19.5) years were registered. The most common mechanism of injury was road traffic crash (RTC) (53.2%), followed by fall (21.1%) and penetrating injuries (18.7%). RTC represented a remarkable proportion of the injuries with higher injury severity score (ISS) (P = 0.046). The mean hospital length of stay (LOS) was 9.8 (±12.2) days. There were significant relationships between Glasgow Coma Scale (GCS) (P = 0.03), drug abuse (P = 0.05), and ISS (P = 0.008) as independent variables and LOS. 21.6% of the patients were admitted to ICU, with a larger proportion of fall injuries (44.4%) (P = 0.002). Eight patients (4.7%) died during hospitalization, of which 7 cases were male. There was significant association between increasing age and ISS with death outcome. Conclusion: After successful implementation of NTRI at a major trauma center in Tehran, RTC was identified as the main cause of admission. Most patients were young men. The mean time interval between injury occurrence and hospital admission was too long. These findings could be used to improve quality of trauma care and formulate targeted preventive strategies. [ABSTRACT FROM AUTHOR]

Objective: Road traffic injury (RTI) is the second leading cause of death and disability, and motorcycle crashes rank as the first cause of traffic fatality in Iran. We aimed to compare various characteristics between traumatized motorcycle riders and pillion passengers registered with the National Trauma Registry of Iran (NTRI)., Methods: This is a retrospective study of the NTRI, an ongoing multicenter trauma database built on a registry. This study included injured motorcyclists from six major trauma centers nationwide admitted between February 2017 and November 2023. Motorcyclists should have been hospitalized for RTIs and met the NTRI's inclusion criteria. We assessed patients regarding their demographics, clinical features, the pattern of injuries, and diverse in-hospital outcomes., Results: Of 54,342 registered patients in the NTRI, 7,594 motorcyclists were included. Of them, 6,636 (87.4%) were riders, and 958 (12.6%) were pillion passengers. Among all, 7165 (94.5%) were male, and 420 (5.5%) female ( p  < 0.001). Only 656 (9.9%) of riders and 24 (2.5%) of pillion passengers were wearing helmets ( p  < 0.001). Lone motorcyclist crashes led to injuries in 1,394 (21.2%) riders and 332 (35.5%) pillion passengers ( p  < 0.001). Glasgow Coma Scale (GCS) was 3 to 8 in 204 (3.1%) riders and 16 (1.7%) pillion passengers ( p  = 0.016). The most frequent pattern of poly-trauma was "head and thorax," with 43 (32.3%) riders and 5 (25.0%) pillion passengers ( p  = 0.362). Univariable logistic regression analysis showed that Intensive Care Unit (ICU) admission (OR = 0.78, CI 95% = 0.62 to 0.97, p  = 0.028) and mechanical ventilation (OR = 0.58, CI 95% = 0.39 to 0.84, p  = 0.004) were significantly lower in pillion passengers compared to motorcycle riders. After adjustment for age, gender, occupational status, and helmet use, being a rider or a pillion passenger didn't have a significant association with any of the in-hospital outcomes., Conclusions: Motorcycle riders and pillion passengers sustain the same injuries in terms of pattern, severity, and in-hospital outcomes. Therefore, healthcare providers can approach them similarly. Since there is a high number of underage riders and helmets are not used commonly, there should be more police enforcement in this case.

Background: The National Spinal Cord Injury Registry of Iran (NSCIR-IR) and the National Trauma Registry of Iran (NTRI) were established to meet the data needs for research and assessing trauma status in Iran. These registries have a group of patients shared by both registries, and it is expected that some identical data will be collected about them. A general question arises whether the spinal cord injury registry can receive part of the common data from the trauma registry and not collect them independently., Methods: We examined variables captured in both registries based on structure and concept, identified the overlapping period during which both systems recorded data in the same centers and extracted relevant data from both registries. Further, we evaluated the data for any discrepancies in amount or nature and pinpointed the underlying reasons for any inconsistencies., Results: Out of all the variables in the NSCIR-IR database, 18.6% of variables were similar to the NTRI in terms of concept and structure. Although four hospitals participated in both registries, only two (Sina and Beheshti Hospitals) had common cases. Patient names, prehospital intubation, ambulance arrival time, ICU length of stay, and admission time were consistent across both registries with no differences. Other common data variables had significant discrepancies., Conclusion: This study highlights the potential for health information exchange (HIE) between NSCIR-IR and NTRI and serves as a starting point for stakeholders and policymakers to understand the differences between the two registries and work toward the successful adoption of HIE., (© 2024 The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.)

Background: Lengthy hospitalization may lead to an increased hospital-acquired patient complication, including infections, as well as increased costs for both healthcare systems and patients. A few studies evaluated the impact of various clinical and demographic variables on patients' length of stay (LOS). Hence, in this study, we aimed to investigate the impact of various variables on traumatic patients' LOS., Methods: This is a retrospective single-center, registry-based study of traumatic patients admitted to Taleqani, a major trauma center in Kermanshah, Iran. A Minimal Dataset (MDS) was developed to retrieve traumatic data on demographic and clinical aspects. We used univariable and multiple quantile regression models to evaluate the association between independent variables, including ISS, GCS, and SBP, with LOS. LOS is practically defined as the time interval between hospital admission and discharge. The LOS durations have been presented as median (Q1 to Q3) hours. A p-value of <0.05 was considered statistically significant., Results: A total of 2708 cases were included in this study, with 1989 (73.4%) of them being male. The median LOS was 87.00 (48.00 to 144.00) hours. When adjusted for systolic blood pressure (SBP), Glasgow Coma Scale (GCS), Injury Severity Score (ISS), and cause of injury, the two characteristics of spine/back and multiple trauma were significantly associated with the higher LOS, with 43 (20.5 to 65.48) and 24 (10.39 to 37.60) hours more than extremities ( P < 0.001 and P = 0.005). Besides, the patients admitted due to road traffic injuries (RTI) were discharged 16 and 41 hours later than falling and cutting/stabbing ( P = 0.008 and < 0.001, respectively). Moreover, the patients with ISS≥16 and 9≤ISS≤15 had a median of 51 (21 to 80) and 34 (22 to 45) LOS hours more, compared to 1≤ISS≤8, respectively ( P < 0.001). The trauma cases experiencing SBP ≤ 90 mmhg on admission had a median of 41 (20 to 62) hours more hospitalization period than those with SBP> 90 mmhg ( P < 0.001). At last, the patients with GCS of 9 to 12 and GCS of 3 to 8 were hospitalized for 39 and 266 hours more than GCS of 13 to 15 ( P < 0.001)., Conclusion: Determining independent determinants of prolonged LOS may lead to better identifying at-risk patients on admission. Trauma care providers should consider the following risk factors for increased LOS: higher ISS, Lower GCS, and SBP, multiple trauma or spine injury, and trauma resulting from falling or cutting/stabbing. As a result, the impact of extended LOS might be reduced by intervening in the related influencing factors., Competing Interests: The authors declare that they have no competing interests., (© 2024 Iran University of Medical Sciences.)

Objective: The WHO estimates the global incidence of death by drowning to be about 300 000 cases per year. The objective of this study was to estimate the trend in mortality due to drowning in all provinces of Iran in all age groups and both genders from 1990 to 2015., Study Design: The National and Subnational Burden of Diseases (NASBOD) project is a comprehensive project in Iran. It is based on the Global Burden of Disease study and includes novel methods to estimate the burden of diseases in Iran., Methods: This study used the results of the mortality rate due to drowning as part of NASBOD and investigated the causes behind the mortality rates. The data set recorded mortality rates by 19 age groups and two genders with the corresponding subnational pattern during the time period from 1990 to 2015., Results: The drowning mortality rate decreased in Iran from 1990 to 2015. From 1990 to 2015, the annual percentage change for males and females was -5.28% and -10.73%, respectively. There were 56 184 male and 21 589 female fatalities during the study period. The highest number of deaths was seen in 1993 with 4459, and the lowest number of fatalities was observed in 2015 with 903 deaths., Conclusion: Our data showed a decline in drowning mortality in Iran from 1990 to 2015, but the rates and declines varied by province. Our findings are of great importance to health officials and authorities in order to further reduce the burden of drowning., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. No commercial re-use. See rights and permissions. Published by BMJ.)