Estimate Hearing Recovery Rate Using Statistical Analysis of Sudden Sensorineural Hearing Loss / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Sudden deafness is not rare but its pathophysiology has not been fully determined and treatment is controversial at present. There is much debate regarding the prognostic factors in sudden deafness patients. Various studies have been done to find out factors concerned with the recovery of sudden deafness, but there are still many unknown components as the probability of recovery from sudden deafness depends on many factors. The aim of this study is to identify an expectation of recovery by regression formula. SUBJECTS AND METHOD: We reviewed the records of 241 patients who were admitted for treatment between 2002 and 2005 under the initial diagnosis of idiopathic sudden hearing loss. The patients were treated with steroid, vasodilator and plasma expander. Improvement of hearing was measured by Siegel's criteria and correcting rate. Prognostic factors that might be associated with the degree of hearing recovery were classified and analyzed by the optimal scale regression analysis method using SPSS ver. 12.0. RESULTS: Siegel's criteria and correcting rate have statistical correlation with respect to age, initial hearing level, patterns of pure tone audiogram and duration of initial treatment from onset to hearing improvement after treatment. Vertigo is not associated with hearing improvement. CONCLUSION: The initial hearing level, patterns of pure tone audiogram and duration of initial treatment from onset are associated with the degree of hearing recovery. We produced a calculating model of hearing improvement based on factors affecting hearing improvement.

Readiness Rate of Military Medical Equipment and Analysis on Affecting Factors / 医疗卫生装备

Objective To study the calculating model of military medical equipment readiness rate and the main affecting factors in order to make a valuable reference to the decision -making of medical organization for the further medical support. Methods Based on analysis of the problems in calculating method of military medical equipment readiness rate at present, a new improved calculating model and the analysis method relating to assigning mission was put forward by combining the technical requirements of GJB5338-2005 and the actual of medical equipment management. The factors affecting readiness rate in process of manufacturing, operation and maintenance support were analyzed. Results A new improved calculating model of military medical equipment readiness rate was established and the evaluating method was made by adjusting those correlated parameters in the calculation formulas. Conclusion The solution of the model is simple and convenient and the analyzing results show that the readiness rate is close to the reality. It is a practical method for achieving quality state information of medical equipment, so it can meet the requirements of military medical equipment organization in peacetime.

Statistical Estimate Formula Using Prognostic Factors for Predicting Hearing Recovery in Idiopathic Sudden Sensorineural Hearing Loss / 대한이비인후과학회지

Sudden deafness is not rare but its pathophysiology has not been fully determined and treatment is controversial at present. About concerning factors for the recovery of sudden deafness, various studies have been done, but there are still many unknown things. The probability of recovery from sudden deafness depends on many factors. To evaluate hearing recovery and prognostic factors we studied 65 patients treated with bed rest, steroid, vasodilator, plasma expander, vitamines from March 1988 to October 1995 at our department. Data were statistically examined and we present a model for calculating the probability of patient recovery based on the combined effects of risk factors determined for these variables. Interrelationships among the prognostic factors and their relative importance in predicting hearing recovery are discussed.