A Tutorial of Bland Altman Analysis in A Bayesian Framework.

There are two schools of thought in statistical analysis, frequentist, and Bayesian. Though the two approaches produce similar estimations and predictions in large-sample studies, their interpretations are different. Bland Altman analysis is a statistical method that is widely used for comparing two methods of measurement.

Logistic Regression Models with Unspecified Low Dose-Response Relationships and Experimental Designs for Hormesis Studies.

Hormesis refers to a nonmonotonic (biphasic) dose-response relationship in toxicology, environmental science, and related fields. In the presence of hormesis, a low dose of a toxic agent may have a lower risk than the risk at the control dose, and the risk may increase at high doses. When the sample size is small due to practical, logistic, and ethical considerations, a parametric model may provide an efficient approach to hypothesis testing at the cost of adopting a strong assumption, which is not guaranteed to be true.

Local recurrence is correlated with decreased overall survival in patients with intermediate high-grade localized primary soft tissue sarcoma of extremity and abdominothoracic wall.

Aim: The aim of this study was to determine the effect of local recurrence on overall survival in patients with intermediate high-grade localized primary soft tissue sarcoma (STS) of extremity and abdominothoracic wall.

Methods: This retrospective study identified 133 consecutive patients with intermediate high-grade localized primary STS of extremity and abdominothoracic wall from January 2000 to July 2010. Survival curves were constructed by the Kaplan-Meier method and log-rank test was used to assess statistical significance.

Long-term follow-up of the Copeland mark III shoulder resurfacing hemi-arthroplasty.

Background: Shoulder humeral resurfacing is being performed in increasing numbers. We report the long-term outcome of patients with the Copeland mark III humeral resurfacing hemi-arthroplasty.

Methods: Ninety-five shoulder hemi-arthroplasties were performed in 85 patients, from 1994 to 2003.

A review of shoulder replacement surgery.

Shoulder replacement surgery is employed in the treatment of severe shoulder arthritis and following some proximal humeral fractures. Three different replacements are available: hemiarthroplasty (HAS), total shoulder replacement (TSR) and reverse shoulder replacement (RSR). HAS and TSR are indicated in patients with intact rotator cuffs and RSR for cuff deficient older patients.