Mixed logit model and its application in insurance choices of the new rural cooperative medical system / 南方医科大学学报

<p><b>OBJECTIVE</b>To apply mixed logit model for analyzing the data of new rural cooperative medical with suitability and identify the factors affecting the residents choices of insurance mode.</p><p><b>METHODS</b>Hypothesis test of IIA was performed using the mogtest module of Stata10.0 to test the eligibility of the condition. The mixed logit model was established to allow the parameters to vary in the population using SAS9.1 MDC module.</p><p><b>RESULTS</b>The data in this study did not satisfy the IIA assumption (P<0.01), so that the multinomial logit model was not applicable. The adjusted Estrella of the mixed logit model was 0.6658.</p><p><b>CONCLUSION</b>The mixed logit approach does not rely on the restrictive IIA assumption and allows for correlation patterns between choices and individual variation. This approach can help in the determination of the choices in new rural cooperative medical system.</p>

Clinical application of medial neurocutaneous flap with perforator vessel in upper arm / 中华整形外科杂志

<p><b>OBJECTIVE</b>To report the application of medial neurocutaneous flap with perforator vessel in upper arm.</p><p><b>METHODS</b>Based on the perforator vessel of medial deep main blood vessel in upper arm and blood supply of neurocutaneous flap, as well as their interrelation with vascularity of fascia skin, we designed the medial neurocutaneous flap with perforator vessel in upper arm to repair skin defects in shoulder, arm and elbow joint in 5 cases.</p><p><b>RESULTS</b>All the flaps survived completely with primary healing. The patients were followed up for 6-12 months. The contour of flaps and the function of shoulder and elbow joint were satisfactory.</p><p><b>CONCLUSION</b>The neurocutaneous flap has a reliable blood supply and easily performed. It is very desirable for repairing skin defect in upper extremity.</p>