720 Scalds and Contact Burns: Are They Really Different?

Abstract

Abstract Introduction Prior studies comparing scalds and contact burns rarely address the affect of burn etiology on burn depth. However, it is commonly believed that scalds tend to heal faster than similarly sized contact and flame burns. As a result, expectant therapy is often preferred after scald injuries. We compared the percentages of full-thickness burns based on burn etiology controlling for burn size, location and patient age. We hypothesized that the percentage of full thickness burns would be lower after scalds compared with contact and flame burns. Methods We performed a retrospective chart review of a prospectively collected burn registry of all patients admitted to a regional burn center between 2000–2010. Data collection included patient and burn characteristics including age, gender, body location, and burn etiology. We compared the percentages of full thickness burns among scald, contact and flame burns using Chi-square tests. Stepwise logistic regression was used to adjust for age, location, and burn size. Results There were 1038 patients in the study with either scald (n=537, 52%), fire/flame (n=434, 42%) or contact (n=67, 6%) burn. Mean (SD) age was 29 (25); 75% were male. Mean (SD) total body surface area (TBSA) was 11 (13)%. Mean (SD) length of stay was 10 (18) days. The percentages of full thickness burns by etiology were scalds 13.1%, fire/flame 34%, and contact burns 45% (P< 0.001). Patients with scalds were younger (22+/-24) than patients with contacts (32+/-28) and fire/flame (38+/-22) burns. Multivariate analysis for predicting full thickness burns found that compared with contact burns, scalds were less likely full thickness (OR 0.23, 95%CI 0.11–0.48) while fire/flame burns were as likely to be full thickness (OR 0.54, 95%CI 0.26–1.15). TBSA and age were also associated with full thickness burns (OR 1.06, 95%CI 1.04–1.09 and OR 1.015, 95%CI 1.007–1.024, respectively). Burns on the head and neck were less likely to be full thickness (OR 0.30, 95%CI, 0.11–0.82). Conclusions Scald burns are significantly less likely to be full thickness than contact or fire/flame burns. Applicability of Research to Practice Based on these results, expectant therapy may be more appropriate for scalds than contact or fire/flame burns.