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BMC Emergency Medicine

Open Access

Burn injury characteristics: findings from Pakistan National Emergency Department Surveillance Study

  • Emaduddin Siddiqui1Email author,
  • Nukhba Zia1,
  • Asher Feroze1,
  • Safia Awan2,
  • Arifa Liaquat Ali1,
  • Junaid Abdul Razzak3, 6,
  • Adnan A Hyder4 and
  • Asad Latif4, 5
BMC Emergency Medicine201515(Suppl 2):S5

https://doi.org/10.1186/1471-227X-15-S2-S5

Published: 11 December 2015

Abstract

Background

Burn injury is an important yet under-researched area in Pakistan. The objective of this study was to determine the characteristics and associated outcomes of burn injury patients presenting to major emergency departments in Pakistan.

Methods

Pakistan National Emergency Department Surveillance (Pak-NEDS) was a pilot active surveillance conducted between November 2010 and March 2011. Information related to patient demographics, mode of arrival, cause of burn injury, and outcomes was analyzed for this paper. Data were entered using Epi Info and analyzed using SPSS v.20. Ethical approval was obtained from all participating sites.

Results

There were 403 burn injury patients in Pak-NEDS, with a male to female ratio 2:1. About 48.9% of the burn injury patients (n = 199) were between 10 - 29 years of age. There was no statistically significant difference between unintentional and intentional burn injury patients except for body part injured (p-value 0.004) and ED disposition (p-value 0.025). Among 21 patients who died, most were between 40 - 49 years of age (61.9%) and suffered from fire burns (81%).

Conclusion

Burn injuries are a burden on emergency rooms in Pakistan. We were able to demonstrate the significant burden of burn injuries that is not addressed by specialized burn centers.

Keywords

BurnssurveillancePakistan

Background

Burn injuries are a global public health problem with physical, psychological, and economic implications for patients, their families, and society as a whole [1]. Around 90% of all burns injuries occur in low- and middle income countries (LMICs) [2]. Burns are the fourth leading cause of injury following road traffic injuries, falls, and interpersonal violence, accounting for 5 - 12% of all injuries worldwide and around 11 million patients requiring medical attention [35]. About 265,000 people die each year due to burn injuries according to the World Health Organization (WHO) [6]. This current burden of burn injuries is deeply inequitable, with incidence disproportionately affecting the poor and the vulnerable [7].

Around two-thirds of burn injuries occur in the African, Eastern Mediterranean and South-East Asia regions of the WHO [8]. The annual incidence of burn injuries in the Eastern Mediterranean and South-East Asia regions is estimated to be 187 and 243 per 100,000 population, respectively [9]. Mortality rates from fire-related burns are the highest in the South-East Asia region (11.6 per 100,000 population) and when compared to the 1 death per 100,000 population found in high-income countries (HICs), this is one of the largest discrepancies for any injury mechanism [2]. The pattern of burn injury and the groups affected in LMICs and HICs also differs; for example, among the 15-59 year age group, the mortality rate due to fire-related burn injury in HICs is twice as high for males compared to females, while the reverse is true in LMICs [2].

Burn injury is an important yet under-researched area in Pakistan. The Global Burden of Disease 2010 study estimates that the age-standardized mortality rate for injury caused by fire, heat, and hot substances is 5.8 per 100,000 population in Pakistan [2]. A burn facility-based study from Karachi estimated burn-associated mortality rate among adults between 15 - 55 years to be even higher at 10.2 per 100,000 population [10]. Some risk factors reported to be associated with admission and mortality include female gender, age >50 years, fire burn, inhalational injury, and total body surface area (TBSA) of >40% [11, 12]. However, most of the existing knowledge regarding burn injuries in Pakistan is from single-center studies in specialized burn hospitals found in major cities [1115].

Existing data make it difficult to estimate the true burden of burn injuries on the general population and little is known about the epidemiology of burn injury in the population that does not present to specialized burn centers. This is an important knowledge gap as specialized burn centers are not accessible to a large portion of the Pakistani population. Emergency departments (EDs) are a logical first point of contact for care of burn injury patients. The overall aim of this study is to determine the characteristics of burn injury patients presenting to urban tertiary care EDs across Pakistan. The specific objectives of the study are to understand burns as a mechanism of injury for unintentional and intentional injuries and to look at burn injury characteristics based on patient disposition from the ED.

Methods

The Pakistan National Emergency Departments Surveillance (Pak-NEDS) was an active surveillance program conducted in seven major urban tertiary care EDs across Pakistan. Data was collected between November 2010 and March 2011 on all patients seeking care in participating EDs. Pak-NEDS enrolled 274,436 patients. The study sites consisted of two private and five public sector hospitals, each of which are considered major tertiary care centers in their respective cities. These centers included: the Aga Khan University (AKU) and Jinnah Post-graduate Medical Center in Karachi; Benazir Bhutto Hospital in Rawalpindi; Lady Reading Hospital in Peshawar; Mayo Hospital in Lahore; Sandeman Provincial Hospital in Quetta; and Shifa International Hospital in Islamabad.

A one-page standardized data collection tool was developed based on the ambulatory care survey from the Centers for Disease Control and Prevention, USA and previous surveillance conducted in Pakistan [16, 17]. The tool was reviewed and approved by the heads of the EDs at each of the institutions involved in the study. Data were collected by dedicated data collectors hired and trained specifically for Pak-NEDS. All patients coming to the participating EDs were approached after their registration in the ED; data was gathered by interviews with patients or next of kin, from the ED physician, and by review of the patient medical record. All data were gathered while the patient was in the ED and there was no contact with the patient following discharge from the ED. Ethical approval was obtained from all participating sites in Pakistan as well as from the Institutional Review Board of the Johns Hopkins Bloomberg School of Public Health in the United States.

For the purpose of this analysis, we looked at all the patients in the Pak-NEDS dataset who presented to the ED with any form of burn injury. We analyzed information related to patient demographics (such as age, gender, and ethnicity), mode of arrival to ED, cause and intent of burn injury, and disposition from the ED. Data was entered into Epi Info version 3.3.2 by a data management team at AKU [18]. For purposes of comparison, age was categorized into seven age groups: under 5 years, 5 - 9 years, 10 - 19 years, 20 - 29 years, 30 - 39 years, 40 - 49 years, and 50 years and above. Patient disposition from the ED was categorized into: discharged home from ED; admitted to hospital for further care and management; death in ED; or 'Other,' which included left ED without being seen, left against medical advice, or referred to another facility. Data analysis was conducted using SPSS version 20 [19].

For descriptive analysis, frequencies for gender, type of hospital, mode of arrival to ED, intent of injury, and cause of injury were calculated. Due to the non-normal distribution of age in the dataset, median age and interquartile range were calculated. The intent of burn injury and three disposition categories - discharged from ED, admitted, and death in ED - were separately compared with patient demographic and burn injury characteristics using chi squared tests and Fisher Exact test. The level of significance was set at 0.05.

Results

There were 403 burn injury patients in Pak-NEDS. This translates into 146.8 burn injury patients per 100,000 ED visits in Pakistan. Males comprised 67.2% (n = 271) of patients, outnumbering females in all age groups leading to an overall male to female ratio of 2:1 (Table 1). Nearly half of the patients (n = 199) were between 10 - 29 years of age; a quarter of the patients were over 40 years. The median age was 25 years (interquartile range 19 - 38 years). Most burn injury patients arrived to the ED via non-ambulance transport (n = 331, 82.13%).
Table 1

Demographic characteristics of burn patients in Pakistan (n = 403)

Demographic Characteristics

n (%)

Gender

 

   Male

271 (67.2)

   Female

132 (32.8)

Age Group

 

   Under 5 years

22 (5.5)

   5-9 years

19 (4.7)

   10-19 years

68 (16.9)

   20-29 years

131 (32.5)

   30-39 years

66 (16.4)

   40-49 years

59 (14.6)

   ≥ 50 years

38 (9.4)

Mode of Transport

 

   Ambulance

25 (6.2)

   Non ambulance

331 (82.13)

   Not reported

47 (11.7)

Hospital Type

 

   Public Hospital

377 (93.5)

   Private Hospital

26 (6.5)

The intent of the injury was known for about three-quarters (n = 308) of burn patients and of these about 65.3% (n = 201) were reported to be unintentional in nature. For about a quarter of patients (n = 107, 26.5%), burns were recorded as intentional burns. The main causes of burns were scalds (n = 259, 64.3%), followed by fire, flame, or smoke burns (n = 66, 16.4%). The injured body region was known in 320 patients (79.4%), with extremities being the most commonly burnt (n = 174, 54.4%), followed by head, neck, and face (n = 101, 31.6%). Patient disposition from the ED was known for about 80% (n = 324) of patients; 20.1% (n = 65) were admitted for further care, and 6.5% (n = 21) died in the ED (Table 2).
Table 2

Burn injury characteristics in Pakistan (n = 403)

Burn Injury Characteristics

n (%)

Intent of injury (n = 308)

 

   Self-inflicted

45 (14.6)

   Assault

62 (20.1)

   Unintentional

201(65.2)

Cause Of Burn

 

   Scalds

259 (64.3)

   Fire burns

66 (16.4)

   Chemical

10 (2.5)

   Others

68 (16.9)

Body Part Injured (n = 320)

 

   Limbs

174 (54.4)

   Head, neck and face

101 (31.6)

   Thorax

20 (6.3)

   Other

25 (7.8)

ED Disposition (n = 324)

 

   Discharged from ED

218 (67.3)

   Admitted

65 (20.1)

   Expired

21 (6.5)

   Others *

20 (6.2)

*Includes referral and left against without being seen

Missing data: 23.6% for intent of injury, 20.6% for body part injured, 19.6% for ED disposition

The intent of burn injury was compared with patient demographic (gender, age group, mode of transportation, hospital type) and burn injury characteristics (cause of burn, body part injured, degree of burns, ED disposition). There was no statistically significant difference between unintentional burn injury patients and patients with intentional injury caused by burns except for body part injured (p-value 0.004) and ED disposition (p-value 0.025). (Table 3)
Table 3

Comparison of characteristics of burn injury patients based on intent of injury (n = 308)

Variables

Intent of injury

p-value*

 

Unintentional

n = 201 (65.2%)

Intentional

n = 107 (34.7%)

 
 

n

%

n

%

 

Gender

    

0.343

   Male

138

68.7

79

73.8

 

   Female

63

31.3

28

26.2

 

Age Group

    

0.097**

   Under 5 years

14

7

5

4.7

 

   5-9 years

15

7.5

3

2.8

 

   10-19 years

32

15.9

16

15

 

   20-29 years

67

33.3

37

34.6

 

   30-39 years

26

12.9

25

23.4

 

   40-49 years

32

15.9

10

9.3

 

   ≥ 50 years

15

7.5

11

10.3

 

Mode of Transport (n = 269)

    

0.135

   Ambulance

10

5.8

12

12.2

 

   Non ambulance

161

94.1

86

87.8

 

Hospital Type

    

0.106**

   Public Hospital

181

90

102

95.3

 

   Private Hospital

20

10

5

4.7

 

Cause Of Burn

    

0.620**

   Scald

135

67.2

64

59.8

 

   Fire/Flame/Smoke

32

15.9

21

19.6

 

   Chemical

5

2.5

4

3.7

 

   Others

29

14.4

18

16.8

 

Body part injured (n = 278)

     

   Limbs

89

48.4

49

64.5

 

   Head, neck and face

60

32.6

22

28.9

0.004**

   Thorax

10

5.4

5

6.6

 

   Other

25

13.6

0

0

 

Degree Of Burn (n = 39)

    

0.147**

   >20%

21

61.8

1

20

 

   <20%

13

38.2

4

80

 

ED disposition (n = 252)

    

0.025**

   Discharged from ED

109

64.9

69

82.1

 

   Admitted from ED

28

16.7

10

11.9

 

   Death

17

10.1

3

3.6

 

   Others***

14

8.3

2

2.4

 

*p-value: bold values are significant. Analysis was conducted using Chi square test with level of significance 0.05

** Analysis was conducted using Fisher Exact test with level of significance 0.05

***Left without being seen, left against medical advice, referred patients

Table 4 compares patient and burn injury characteristics based on three ED disposition groups (discharged from ED, admitted, and death). A statistically significant difference was observed in all patient and burn injury characteristics between the three categories of ED disposition except for intent (p-value 0.186) and degree of burns (0.073). Patients between 20 - 29 years of age comprised the largest proportion of those discharged from the ED (36.7%, n = 80) and those that were admitted (30.8%, n = 20). Out of the 21 patients who died in the ED, 61.9% were between 40 - 49 years of age. There were no deaths in children under 10 years of age. The majority of patients who were discharged home from the ED (n = 212, 97.2%) or were admitted (n = 63, 96.9%) presented to the EDs of public hospitals while the majority of those who died due to burns presented to private hospitals (n = 16, 76.2%) (p-value <0.001).
Table 4

Comparison of ED disposition of burn injury patients (n = 304)

Variables

ED disposition of burn injury patients

p-value*

 

Discharged from ED

n = 218

Admitted

n = 65

Death

n = 21

 
 

n

%

n

%

n

%

 

Gender

      

0.019

   Male

152

69.7

38

58.5

19

90.5

 

   Female

66

30.3

27

41.5

2

9.5

 

Age Group

      

<0.001

   Under 5 years

11

5

5

7.7

-0

0

 

   5-9 years

11

5

3

4.6

0

0

 

   10-19 years

39

17.9

10

15.4

2

9.5

 

   20-29 years

80

36.7

20

30.8

3

14.3

 

   30-39 years

32

14.7

14

21.5

3

14.3

 

   40-49 years

27

12.4

7

10.8

13

61.9

 

   ≥ 50 years

18

8.3

6

9.2

0

0

 

Mode of Transport (n = 270)

      

0.04

   Ambulance

11

5.3

7

11.7

1

33.3

 

   Non ambulance

196

94.7

53

88.3

2

66.6

 

Hospital Type

      

<0.001

   Public Hospital

212

97.2

63

96.9

5

23.8

 

   Private Hospital

6

2.8

2

3.1

16

76.2

 

Intentional Type

      

0.186

   Self-inflicted

33

18.5

4

10.5

1

5

 

   Assault

36

20.2

6

15.8

2

10

 

   Unintentional

109

61.2

28

73.7

17

85

 

Cause Of Burn

      

<0.001

   Scalds

153

70.2

36

55.4

1

4.8

 

   Fire/Flame/Smoke

29

13.3

8

12.3

17

81

 

   Chemical

6

2.8

1

1.5

1

4.8

 

   Others

30

13.8

20

30.8

2

9.5

 

Body part injured (n = 252)

      

<0.001

   Limbs

113

63.1

26

48.1

0

0

 

   Head, neck and face

53

29.6

22

40.7

1

5.3

 

   Thorax

11

6.1

6

11.1

1

5.3

 

   Other

2

1.1

0

0

17

89.5

 

Degree Of Burn (n = 26)

      

0.073

   >20%

7

36.8

6

85.7

0

0

 

   <20%

12

63.2

1

14.3

0

0-

 

*p-value: bold values are significant.

Analysis was conducted using Fisher Exact test with level of significance 0.05

Burns caused by scalds were the most common reason amongst those discharged from the ED (n = 153, 70.2%), followed by fire, flame, or smoke (n = 29, 13.3%). The common reasons amongst those admitted from the ED were scald (n = 36, 55.4%). Fire, flame, or smoke was the most common cause of burns in patients who died in the ED (n = 17, 81%). The extent of the burn injury was known for only a very small number of patients (n = 26); a vast majority of those who were admitted suffered from >20% burns (n = 6, 85.7%). Information regarding degree of burns for patients who died was not available.

Discussion

This study presents data from seven major tertiary care centers in Pakistan, capturing important characteristics of burn injury patients. It is one of few studies to show the actual burden of burn injuries on the healthcare system. The majority of these patients used public transport to access the healthcare system. We show that males and young adults experience a higher proportion of burn injuries, but the majority of the mortality burden is borne by those older than 40 years. A high proportion of burn injury patients presenting to private hospitals died. Hot surfaces or liquid and burns due to fire were the most common causes of burns, with death occurring more frequently among patients with fire-related burn injuries.

Our calculated incidence rate of 147 per 100,000 patients presenting to Pakistani EDs is almost twice that noted in a previous study conducted in Rawalpindi, Pakistan which reported an incidence of 76 per 100,000 for ED visits [20]. Our observations on gender differed from other studies from Pakistan, India, and Eastern Mediterranean region, with fewer females as compared to males experiencing burn injuries [11, 14, 21, 22]. The reason for fewer females presenting with burn injuries in our study may be due to under-reporting in females, delay in seeking care. For example, women might not seek care, or not be supported in seeking care, especially if the injury was intentional. This study shows a higher percentage of men presenting with intentional burn injuries. This is in contrast to a recent study from Nepal which reported more females presenting with intentional burn injury [23]. Our findings also differ from various facility-based studies from India and China [22, 24] and population-based reviews from the Eastern Mediterranean and South-East Asia regions of WHO [21, 25], where males under 5 years and adolescent and young females were reported to experience more burn injuries.

Similar to this study, a higher incidence of burn injuries among young adults has been reported at the country and regional level in other studies from China, Pakistan, India, Iran, and Turkey [15, 21, 22, 2427]. However, other studies from Bangladesh and Oman have identified children and elderly as the most vulnerable groups, which is in contrast to this study's findings [7, 28, 29]. Injuries in young adults have economic implications for both the affected individuals and their families, given high levels of participation in the workforce at these ages, necessitating an accurate assessment.

In our study, those who died had suffered from fire-related burns and were more likely to be older individuals. Burn-related injuries are the fourth leading cause of unintentional injury death in the elderly and this risk is disproportionately higher for this age group compared to the general population [6]. Our study showed overall burn mortality to be 6.5%, which is lower compared to other studies performed in Pakistan, which have reported mortality due to burn injuries ranging from 14% - 41.3% [1115]. A possible reason for this discrepancy could be the fact that several of these earlier studies were conducted in specialized burn centers and units and/or that there may be under-reporting of deaths in Pak-NEDS. The mortality due to burn injuries among various countries in the WHO Eastern Mediterranean Region varies between 5% - 37% [21]. This variation in mortality could be because of different study settings, burn severity, availability of experts, or resources to manage burns. Although previous studies on burns have shown that there is higher mortality among patients with intentional burn injuries, our study showed that the majority of such patients were discharged from the ED [23]. This could be because most of the patients with intentional burn injuries are taken to specialized burn centers due to the severity of their injuries.

Scald and flame burns were the most common cause of burns, which is consistent with previous studies from Pakistan, Iran, India, and reviews from the EMRO region [11, 13, 14, 21, 22, 25, 27, 30]. Our study lacks information related to the cause of the fire or flame; however, previous studies have reported kerosene stove burners and wood-based cooking fuel as the main source of burn related injuries amongst females of Southeast Asia [22].

Most of the existing centers are located in major cities of the country. Karachi, the largest metropolis in the country with more than 20 million people, has just one public and one private sector burn center [11, 31]. More rural areas of the country face an even worse situation, with few centers equipped to handle burn injuries and limited options for referral. These facilities, most often in the public sector, are typically preferred by patients, as they are economical or free of cost, and more easily accessible. However, they tend to lack basic necessities such as equipment and trained healthcare providers.

Our analysis demonstrated that most of the deaths by burn injury occurred in private hospitals, perhaps as a result of more severe burns being treated there compared to those who went to public hospitals. Another possible cause could be that these patients may have been referred to private hospitals from public hospitals for further management [15]. There are also other factors that may influence the lack of care for patients with burn injuries in Pakistan including: densely populated areas; the vast catchment area for each tertiary care hospital (public and private); poor economic and educational status of the population; lack of awareness regarding prevention practices, such as safe fire use; or use of non-approved and inappropriate first aid treatments like applying tooth paste, cow dung, or other home remedies [32, 33].

This study was one of the largest multi-center collaboration of EDs in Pakistan; the hospitals represented only major tertiary care hospitals in large cities across the country. This study therefore might not have captured patients who do not typically present at these types of hospitals, such as those that might have utilized primary or secondary centers, or those who might have gone to dedicated burn centers. The urban locations of the participating hospitals might have also resulted in a skewed distribution of demographic characteristics of patients, burn injury, and outcome. This study lacked information related to location of burn injury such as home or workplace; causes of burn such as kerosene oil, electricity, or chemicals; severity of burn injury including total body surface area burnt; and associated injuries and comorbid conditions. These are important factors to consider to determine outcomes of burn injury patients [21].

The dataset had missing information for some variables such as 23.6% for intent of injury, 20.6% for body part injured, and 19.6% for ED disposition. This resulted in limitations in performing regression analysis to get an in-depth understanding of risk factors associated with the burns presenting to EDs in Pakistan. This highlights the need for better data records in the EDs of Pakistan.

Conclusion

We were able to demonstrate a significant burden of burn injuries that is not addressed by specialized burn centers. There is also a critical need to continue research and surveillance on burn patients in Pakistan, in order to broaden the evidence base on the epidemiology of these injuries, as well as the outcomes of patients following discharge. Such information, if available in future studies, will inform programs and policy emphasizing primary prevention, short-term treatment, and long-term management of burn injuries in low-resource settings such as Pakistan where these efforts are extremely deficient.

Declarations

Acknowledgements

The authors would like to thank the data collection team at each participating site. We are also grateful to Ms. Leann Rosenberg for language editing of the paper. The Pak-NEDS study was supported through the "Johns Hopkins International Collaborative Trauma and Injury Research Training Program" [Grant No. D43TW007292] by Fogarty International Center of the United States National Institutes of Health. The content is solely the responsibility of the authors and does not represent the views of Fogarty or NIH.

This article has been published as part of BMC Emergency Medicine Volume 15 Supplement 2, 2015: Articles from the Pakistan National Emergency Departments Surveillance Study (Pak-NEDS). The full contents of the supplement are available online at http://www.biomedcentral.com/bmcemergmed/supplements/15/S2. Publication of this supplement was funded by the Johns Hopkins School of Public Health.

Authors’ Affiliations

(1)
Department of Emergency Medicine, Aga Khan University
(2)
Department of Medicine, Aga Khan University
(3)
Department of Emergency Medicine, John Hopkins School of Medicine
(4)
Johns Hopkins International Injury Research Unit, Department of International Health, Johns Hopkins Bloomberg School of Public Health
(5)
Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine
(6)
The author was affiliated with the Department of Emergency Medicine, Aga Khan University, at the time when study was conducted

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© Siddiqui et al. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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