The effect of pre-existing malnutrition on pediatric burn mortality in a sub-Saharan African burn unit.

INTRODUCTION: Nutritional status predicts burn outcomes in the developed world, but its effect on burn mortality in the developing world has not been widely studied. In sub Saharan Africa, burn is primarily a disease of children, and the majority of children in sub-Saharan Africa are malnourished. We therefore sought to determine the prevalence and effect of malnutrition on burn mortality at our institution. METHODS: This is a retrospective review of children aged 0-5, with anthropomorphic measurements available, who were admitted to our burn unit from July 2011 to May 2016. Age-adjusted Z scores were calculated for height, weight, weight for height, and mid-upper arm circumference (MUAC). Following bivariate analysis, we used logistic regression to construct a fully adjusted model of predictors of mortality. RESULTS: Of the 1357 admitted patients, 839 (61.2%) were aged 0-5. Of those, 512 (62.9%) had one or more anthropomorphic measurements available, and were included in the analysis. 54% were male, and the median age was 28 months. The median TBSA was 15%, with a majority of burns caused by scalds (77%). Mortality was 16%. Average Z-score for any of the indicators of malnutrition was -1.45±1.66. TBSA (OR: 1.08, 95% CI: 1.06, 1.11), decreasing Z-score (OR: 1.19, 95% CI: 1.00, 1.41), and flame burn (OR: 2.51, 95% CI: 1.40, 4.49) were associated with an increase in mortality. CONCLUSION: Preexisting malnutrition in burn patients in sub-Saharan Africa increases odds of mortality after controlling for significant covariates. Survival of burn patients in this region will not reach that of the developed world until a strategy of aggressive nutritional support is implemented in this population.

The effect of seasonality on burn incidence, severity and outcome in Central Malawi.

INTRODUCTION: In much of the world, burns are more common in cold months. However, few studies have described the seasonality of burns in sub-Saharan Africa. This study examines the effect of seasonality on the incidence and outcome of burns in central Malawi. METHODS: A retrospective analysis was performed at Kamuzu Central Hospital and included all patients admitted from May 2011 to August 2014. Demographic data, burn mechanism, total body surface area (%TBSA), and mortality were analyzed. Seasons were categorized as Rainy (December-February), Lush (March-May), Cold (June-August) and Hot (September-November). A negative binomial regression was used to assess the effect of seasonality on burn incidence. This was performed using both the raw and deseasonalized data in order to evaluate for trends not attributable to random fluctuation. RESULTS: A total of 905 patients were included. Flame (38%) and Scald (59%) burns were the most common mechanism. More burns occurred during the cold season (41% vs 19-20% in the other seasons). Overall mortality was 19%. Only the cold season had a statistically significant increase in burn . The incidence rate ratios (IRR) for the hot, lush, and cold seasons were 0.94 (CI 0.6-1.32), 1.02 (CI 0.72-1.45) and 1.6 (CI 1.17-2.19), respectively, when compared to the rainy season. Burn severity and mortality did not differ between seasons. CONCLUSION: The results of this study demonstrate the year-round phenomenon of burns treated at our institution, and highlights the slight predominance of burns during the cold season. These data can be used to guide prevention strategies, with special attention to the implications of the increased burn incidence during the cold season. Though burn severity and mortality remain relatively unchanged between seasons, recognizing the seasonal variability in incidence of burns is critical for resource allocation in this low-income setting.

Timing of early excision and grafting following burn in sub-Saharan Africa.

BACKGROUND: This study sought to establish appropriate timing of burn wound excision and grafting in a resource-poor setting in sub-Saharan Africa. METHODS: All burn patients (905 patients) admitted to Kamuzu Central Hospital (KCH) Burn Unit in Lilongwe, Malawi over three years (2011-2014) were studied. RESULTS: 275 patients (30%) had an operation during their admission. In patients who received an operation, median age was 5 years (IQR, 2.7-19) and median total body surface area burn was 15% (IQR, 8-25). 91 patients (33%) had early excision (≤5 days) and 184 patients (67%) had late excision (>5 days). Mortality was significantly greater in the early group (25.3% vs. 9.2%, p=0.001). Controlling for total body surface area burn and age, the adjusted predictive probability of mortality were 0.256 (CI 0.159-0.385) and 0.107 (CI 0.062-0.177) if operated ≤5 and >5 days, respectively (p=0.0114). The odds ratio for mortality if operated >5 days is 0.34 (CI 0.15-0.79, p<0.000). CONCLUSIONS: Early excision and grafting in a resource-poor area in sub-Saharan Africa is associated with a significant increase in mortality. Delaying the timing of early excision and grafting of burn patients in a resource-poor setting past burn day 5 may confer a survival advantage.

Burn care delivery in a sub-saharan african unit: A cost analysis study.

INTRODUCTION: There are significant resource challenges to burn surgical care delivery in low and middle-income countries at baseline and only a few burn cost analysis studies from sub-Saharan Africa have been performed. METHODS: This is a retrospective database analysis of prospectively collected data from all patients recorded in the burn registry between June 2011 and August 2014 located at the Kamuzu Central Hospital Burn Unit in Lilongwe, Malawi. We utilized activity-based costing, a bottom-up cost analysis methodology with cost allocation that allows determination of unit cost or cost per service. RESULTS: 905 patients were admitted to the burn unit during the study period. The calculated total monthly burn expenditure for all cost centers was $11,622.66. Per day, the total unit cost was $387.42 with a mean daily per-patient cost of $24.26 (SD ± $6.44). Consequently, the mean cost per in-patient admission was $559.85 (SD ± $736.17). The mean daily cost per 1% total burn surface per patient at our center is $2.65 (SD ± $3.01). DISCUSSION: This burn care cost analysis study helps quantify the relative contribution of differing cost centers that comprise burn care delivery and hospital costs in a sub-Saharan African setting. Accurate and relevant cost information on hospital services at the patient level is therefore fundamental for policy makers, payers, and hospitals. CONCLUSION: Our study has demonstrated that comprehensive burn care is possible at a cost much lower than found in other burn centers in low or middle-income countries and can be sustained with moderate funding.

Photographic assessment of burn wounds: a simple strategy in a resource-poor setting.

OBJECTIVE: To validate the use of photographic burn wound assessment in evaluation of burn size and wound characteristics. METHODS: Feasibility study of agreement between methods of measurement of burn size and characteristics, in patients admitted to the burn unit at Kamuzu Central Hospital (KCH), Malawi, over two months in 2011. Burn wounds were photographed and assessed clinically, concurrently, by an experienced clinician. Photographs reviewed by two blinded burn clinicians after 4-6 weeks. Correlation between clinical assessment and photographic evaluation was calculated using kappa score and Pearson's correlation coefficient. RESULTS: Thirty-nine patients were included in evaluation of TBSA, and fifty wounds assessed for their characteristics. Pearson's correlation coefficient for agreement of TBSA between clinical exam and photograph review by expert#1, and #2, was 0.96, 0.93 (p<0.001), respectively. Pearson's correlation coefficients comparing expert#1 and #2 to the gold standard were: proportion of full-thickness burn (0.88 and 0.81, p<0.001), and epithelialized superficial burn (0.89 and 0.55, p<0.001). Kappa scores were significant for wound evolution (expert#1 0.57, expert#2 0.64, p<0.001), and prognosis (expert#1 0.80, expert#2 0.80, p<0.001). CONCLUSIONS: Burn assessment with digital photography is a valid and affordable alternative to direct clinical exam, alleviating access issues to burn care in developing countries.