OBJECTIVETo introduce the concept, methods for calculation and application of "number needs to be exposed (NNE)" in Epidemiological studies.

METHODSData was analyzed from a study on the association between diaspirin cross-linked hemoglobin (DCLHb) with 28-day mortality in patients with severe traumatic hemorrhagic shock.

RESULTSThe crude "number needed to be exposed for one additional person to be harmed" (NNEH) was 3.7 (95% CI: 2.2-11.5) for the exposure to DCLHb. After controlling the confounding bias of the baseline mortality risk, the adjusted NNEH became 2.6 (95% CI: 1.6-8.0) id., on average, among 2.6 patients exposed to DCLHb, one additional case of death would have developed within 28 days after initial hospitalization if the distribution of baseline mortality risk in exposed group had been equal to that in the unexposed group.

CONCLUSIONNNE could be expressed as the estimated average number of persons needed to be exposed for contributing (either developing or preventing for) one additional case of disease or death in a prospective study when compared with the unexposed persons. As a new index for measuring the absolute effect of an exposure, NNE presented the results on epidemiological studies in a more intuitive and understandable manner. Consequently, this method could be favorably accepted by clinicians, health policy makers and the public.

Epidemiologic Studies ; Hemoglobins ; therapeutic use ; Humans ; Logistic Models ; Randomized Controlled Trials as Topic ; Risk ; Shock, Hemorrhagic ; complications ; drug therapy ; mortality ; pathology ; Software ; Wounds and Injuries ; complications

BACKGROUND: The treatment of malignant pleural mesothelioma (MPM) is challenging, and multimodal treatment including surgery is recommended; however, the role of surgery is debated. The treatment outcomes of MPM in Korea have not been reported. We analyzed the outcomes of MPM in the context of multimodal treatment, including surgery. METHODS: The records of 29 patients with pathologically proven MPM from April 1998 to July 2015 were retrospectively reviewed. The treatment outcomes of the surgery and non-surgery groups were compared. RESULTS: The overall median survival time was 10.6 months, and the overall 3-year survival rate was 25%. No postoperative 30-day or in-hospital mortality occurred in the surgery group. Postoperative complications included tachyarrhythmia (n=4), pulmonary thromboembolism (n=1), pneumonia (n=1), chylothorax (n=1), and wound complications (n=3). The treatment outcomes between the surgery and non-surgery groups were not significantly different (3-year survival rate: 31.3% vs. 16.7%, respectively; p=0.47). In a subgroup analysis, there was no significant difference in the treatment outcomes between the extrapleural pneumonectomy group and the non-surgery group (3-year survival rate: 45.5% vs. 16.7%, respectively; p=0.23). CONCLUSION: Multimodal treatment incorporating surgery did not show better outcomes than non-surgical treatment. A nationwide multicenter data registry and prospective randomized controlled studies are necessary to optimize the treatment of MPM.
Chylothorax ; Combined Modality Therapy ; Hospital Mortality ; Humans ; Korea ; Mesothelioma ; Pneumonectomy ; Pneumonia ; Postoperative Complications ; Prognosis ; Prospective Studies ; Pulmonary Embolism ; Retrospective Studies ; Survival Rate ; Tachycardia ; Wounds and Injuries

Two patients with post-traumatic diabetes insipidus (DI) are reported. One had suffered a fatal injury and the other a mild contusion without amnesia before DI developed. These two instances exemplify the wide spectrum of post-traumatic DI and, hence, the importance of ruling out DI even afer a mild closed-head injury.
Adult ; Case Report ; Central Nervous System/*injuries ; Desmopressin/therapeutic use ; Diabetes Insipidus/drug therapy/*etiology/physiopathology ; Diuresis/drug effects ; Female ; Human ; Male ; Middle Age ; Vasopressins/therapeutic use ; Wounds and Injuries/*complications/mortality

OBJECTIVE: The vulvar cancer is an uncommon disease among female population. Because of its rare incidence, sufficient clinical studies have not been accomplished. However, the prevelance of vulvar cancer will continue to increase because of rapid growth of senile population. The goal of this study is to review the clinical outcome and prognosis of patients with vulvar cancer through the analysis of their clinical data. METHODS: We have performed a retrospective clinical study on 23 patients diagnosed with primary invasive vulvar cancer at Asan medical center from May, 1989 to December, 2003. We reviewed demographic data, pathologic findings, treatments, stages, complications, prognosis and survival time. RESULTS: The mean age was 58.9 years. The most common symptoms were palpable mass (69.5%) and itching sense (21.7%). Among the 23 patients, 21 patients have underwent operation, and two patients who refused to receive operation underwent radiotherapy only. 3 of 21 patients who were surgically treated underwent neoadjuvant chemotherapy, and 5 patients, adjuvant radiotherapy. Histopathologically, squamous cell carcinoma (69.5%) was dominant, and 15 patients turned out to have stage II disease or greater (60.8%). Among the 21 patients who have underwent operation, postoperative complications occurred in 8 patients (38.0%) and 4 of them had underwent radical vulvectomy and bilateral groin lymph node dissection. The most common postoperative complication was wound breakdown (23.8%). CONCLUSION: Although surgery is the principal treatment in vulvar cancer, radical vulvectomy and bilateral groin lymph node dissection more often result in complications than other operations such as wide local excision and hemivulvectomy. Considering the mortality and morbidity, the prognosis of vulvar cancer is poor, but early diagnosis and adequate treatment according to each individual will improve the outcome and prognosis of vulvar cancer.
Carcinoma, Squamous Cell ; Chungcheongnam-do ; Drug Therapy ; Early Diagnosis ; Female ; Groin ; Humans ; Incidence ; Lymph Node Excision ; Mortality ; Postoperative Complications ; Prognosis ; Pruritus ; Radiotherapy ; Radiotherapy, Adjuvant ; Retrospective Studies* ; Vulva ; Vulvar Neoplasms* ; Wounds and Injuries

When treating trauma patients with severe hemorrhage, massive transfusions are often needed. Damage control resuscitation strategies can be used for such patients, but an adequate fresh frozen plasma: packed red blood cell (FFP:PRBC) administration ratio must be established. We retrospectively reviewed the medical records of 100 trauma patients treated with massive transfusions from March 2010 to October 2012. We divided the patients into 2 groups according to the FFP:PRBC ratio: a high-ratio (> or =0.5) and a low-ratio group (<0.5). The patient demographics, fluid and transfusion quantities, laboratory values, complications, and outcomes were analyzed and compared. There were 68 patients in the high-ratio and 32 in the low-ratio group. There were statistically significant differences between groups in the quantities of FFP, FFP:PRBC, platelets, and crystalloids administered, as well as the initial diastolic blood pressure. Bloodstream infections were noted only in the high-ratio group, and the difference was statistically significant (P=0.028). Kaplan-Meier plots revealed that the 24-hr survival rate was significantly higher in the high-ratio group (71.9% vs. 97.1%, P<0.001). In severe hemorrhagic trauma, raising the FFP:PRBC ratio to 0.5 or higher may increase the chances of survival. Efforts to minimize bloodstream infections during the resuscitation must be increased.
Acute Lung Injury/epidemiology/etiology ; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bacterial Infections/epidemiology ; *Blood Transfusion/adverse effects ; *Erythrocyte Transfusion/adverse effects ; Female ; Hemorrhage/etiology/*prevention & control ; Hospital Mortality ; Humans ; Kaplan-Meier Estimate ; Male ; Middle Aged ; Patients ; Respiratory Distress Syndrome, Adult/epidemiology/etiology ; Resuscitation ; Retrospective Studies ; Wounds and Injuries/complications/mortality/*therapy ; Young Adult

BACKGROUND: Craniofacial resection (CFR) has been regarded as a standard treatment for various tumors involving the anterior skull base. The purpose of this study was to evaluate the results of CFR for the patients with anterior skull base malignancies in our hospital. METHODS: We retrospectively analyzed 17 patients with anterior skull base malignancies treated with CFR between 2001 and 2012. Mean follow-up duration was 41 months (range, 2-103 months). RESULTS: Intracranial involvement was found in 11 patients (65%) and orbital extension in 6 patients (35%). Classical bifrontal craniotomy was combined with endoscopic endonasal approach in 14 patients and external approach in 3 patients. Vascularized flap was used for reconstruction of the anterior fossa floor in 16 patients (94%). The most common pathological type was squamous cell carcinoma (6 patients). Gross total resection was achieved in all cases. Postoperative complications developed in 4 patients (24%) and included local wound problem and brain abscess. One patient with liver cirrhosis died from unexpected varix bleeding after the operation. Although postoperative treatment, such as radiotherapy or chemotherapy, was performed in 14 patients, local recurrence was seen in 6 patients. The mean overall survival time after the operation was 69.0 months (95% confidence interval: 47.5-90.5 months) with a 1-, 2-, and 5-year survival rate of 82.3%, 76.5%, and 64.7%, respectively. Postoperative radiotherapy was found to be the powerful prognostic factor for favorable survival. CONCLUSION: Considering the higher local control rate and acceptable complication or mortality rate, CFR with adjuvant radiotherapy is a gold standard treatment option for malignant tumors involving anterior skull base, especially with extensive intracranial involvement.
Brain Abscess ; Carcinoma, Squamous Cell ; Cranial Fossa, Anterior ; Craniotomy ; Drug Therapy ; Follow-Up Studies ; Hemorrhage ; Humans ; Intraoperative Complications ; Liver Cirrhosis ; Mortality ; Orbit ; Paranasal Sinus Neoplasms ; Postoperative Complications ; Radiotherapy ; Radiotherapy, Adjuvant ; Recurrence ; Retrospective Studies ; Skull Base* ; Skull* ; Survival Rate ; Treatment Outcome ; Varicose Veins ; Wounds and Injuries