Bone mineral density and low bone mass in severely burned patients: A retrospective cohort study.

INTRODUCTION: Severe burns can alter bone metabolism through different mechanisms. Despite prior published studies describing the association between burns and a decrease in bone mineral density (BMD), no clinical guidelines currently exist recommending the systematic evaluation of bone health in patients after severe burns. This study aims to describe the BMD of individuals with severe burn injuries and healthy controls and determine the frequency of low-to-normal bone mass (LNBM) and BMD below the expected range for age (BEA). MATERIALS AND METHODS: We conducted a retrospective cohort of patients with either severe thermal or electrical burns and healthy controls paired by gender and age. We performed a dual-energy X-ray absorptiometry at least 90 days after the burn and collected data from each patient's clinical evaluation and clinical file. RESULTS: A total of 77 patients (64 men and 13 women) and their paired controls were included in the study (age [mean ± standard deviation, SD]: 30.37 ± 8.66 years). Patients participated in the study an average of 315 ± 438 days after their burn. The BMD (grs/cm2) in total hip burned vs controls was: 0.998 ± 0.135 vs 1.059 ± 0.12 (p = 0.004); femoral neck 0.876 ± 0.121 vs 0.915 ± 0.097 (p = 0.031), spine 0.977 ± 0.127 vs 1.003 ± 0.076 (p = 0.132).The Z-scores for total hip were - 0.06 ± 1.05 vs 0.41 ± 0.80 (p = 0.002); for neck -0.39 ± 0.89 vs -0.01 ± 0.77 (p = 0.005); and for spine -0.75 ± 1.11 vs -0.32 ± 0.73 (p = 0.005). The proportion of subjects with BMD BEA in burns vs controls was 5.2 vs 1.2% (p = 0.05) in total hip, 3.9 vs 0% (p = 0.045) in the neck, and 18.2 vs 1.2% (p = 0.001) in the spine. The logistic regression model found-in burn patients vs controls-an OR of 9.83 for BMD BEA (CI 95%: 2.17-44.45, p = 003), OR = 4.05 for electrical burns (CI 95%: 1.72-20.89, p = 004) and OR = 15.16 for thermal burns (CI 95%: 2.91-79.00, p = 001). The model also found an OR = 2.48 for LNBM (CI 95%: 1.25-4.93, p = 0.009). The burn variables associated with BMD BEA at any site in the patients were BMI >25 Kg/m2 with an OR = 0.180 (CI 95%: 0.046-0.710, p = 0.014); and the lower limb amputation with an OR = 7.33 (CI 95%; 1.12-48.33, p = 0.038). Five burn patients had a fragility fracture. CONCLUSION: BMD was significantly lower in severely burned patients than in controls, and the proportion BMD BEA cases was significantly higher in the burn patient sample. Severe burns are a strong independent predictor of bone loss, and this risk is maintained for an extended period after the burn.

Predictive Factors for Returning to Work in Burn Adult Patients That Were Working Before Their Injury.

The goal of this study was to identify predictive factors that influence return to work in burn patients treated at the National Center for Burn Care and Research at the National Institute of Rehabilitation (CENIAQ) in México City. This is a retrospective case-control study that included all burn patients of working age (16-91 years old), treated between January 2011 and December 2013. Patients were divided into two groups: unemployed (no work group) and those who returned to work (RTW). The statistical analysis was performed by a logistic regression univariate and multivariate analysis. A total of 210 subjects were included in the study. The mean age was 38 ± 15 years and 66.7% of them were male. One hundred sixty-five patients (79.6%) were able to return to work after treatment. Through univariate analysis it was found that the predictive factors for not returning to work after injury were: education lower than elementary school (OR: 3.59; CI 95%: 1.79-7.32); history of epilepsy prior to burn injury (OR: 10.18; CI 95%: 1.9-54.43); total burned surface area (TBSA) ≥20% (OR: 2.87; CI 95%: 1.46-5.64); third-degree burns (OR: 2.64; CI 95%: 1.32-5.29); hospital stay ≥20 days (OR: 2.8; CI 95%: 1.47-5.68); length of stay in the burn intensive care unit (OR: 2.5; CI 95%: 1.25-4.97); secondary infection (OR: 2.24; CI 95%: 1.15-4.38); amputations (one or more regardless of amputation level; OR: 8; CI 95%: 2.52-25.30); burn of the upper extremity (shoulder; OR: 2.21; CI 95%: 0.97-5.03); thigh (OR: 2.41; CI 95%: 1.32-5.14); and knee (OR: 2.81; CI 95%: 1.21-6.55). Some of these factors have never been reported by other authors.