نتایج جستجو برای: marginal effect
تعداد نتایج: 1676207 فیلتر نتایج به سال:
BACKGROUND/AIM To determine the effect of marginal donor livers on mortality and graft survival in liver transplantation (LT) recipients. MATERIALS AND METHODS Donors with any 1 of following were considered marginal donors: age ≥65 years, sodium level ≥ 165 mmol/L and cold ischemia time ≥ 12 h. Donors were classified according to the donor risk index (DRI) < 1.7 and ≥ 1.7. The transplant reci...
Two-part models are an attractive approach for analysing longitudinal semicontinuous data consisting of a mixture of true zeros and continuously distributed positive values. When the population-averaged (marginal) covariate effects are of interest, two-part models that provide straightforward interpretation of the marginal effects are desirable. Presently, the only available approaches for fitt...
Many factors influence the extent to which persons who are eligible for public (or private) aid program actually receive the aid. In predicting the degree of utilization of any particular aid program, a potentially important variable is the marginal stigma cost, the added stigma incurred by a person who accepts the benefits from an incremental aid program for which he is eligible. Empirical exa...
objectives: this study aimed to assess the effect of re-etching of desensitized dentin for five and 10 seconds on marginal microleakage of composite restorations. materials and methods: class v cavities (4x2x2mm) were prepared on the buccal surfaces of 64 third molars and randomly divided into four groups of 16. in the control group, single bond (sb) adhesive was applied after etching. in bb+sb...
OBJECTIVES Marginal adaptation is important for long-term success of full-coverage restorations. The aim of this study was to determine the effect of porcelain firing cycle and different thicknesses of IPS e.max core on marginal accuracy of all-ceramic restorations. MATERIALS AND METHODS A standard stainless steel die with 0.8 mm classic chamfer finish line and 10° taper was used in this in v...
Background: Longitudinal studies are widely used in medical and social sciences. According to repeated measurements in these studies, independence assumption is not observed and therefore suitable models should be selected. In this study, application of marginal and transition models for analyzing the longitudinal data related to hygroscopic expansion of composite is shown. Methods: ...
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