2 Step-by-Step Basic Statistics Using SAS: Student Guide. Chapter 13: Independent-Samples t Test. Chapter 14.Description. Larry Hatchers Step-by-Step Basic Statistics Using SAS: Student Guide first introduces you to SAS software, then leads you through a variety of.With Larry Hatchers Step-by-Step Basic Statistics Using SAS: Exercises, you apply what you. I can recommend the Student Guide and E...

Recent reports have suggested that flow volume curve abnormalities may be of interest in the diagnosis of obstructive sleep apnea syndromes by showing either extrathoracic airway obstruction (ratio of expiratory flow to inspiratory flow at 50 percent of forced vital capacity [FEF50/FIF50] exceeding 1) or upper airway fluttering (indicated by a sawtooth aspect on the mid-half of the inspiratory ...

BACKGROUND Up to 30% of patients with severe aortic stenosis (SAS; indexed aortic valve area <0.6 cm(2)/m(2)) present with low transvalvular gradient despite a normal left ventricular ejection fraction. Presently, there is intense controversy as to the prognostic implications of such findings. Accordingly, the aim of the present work was to compare the natural history of patients with paradoxic...

Which merges files better: the SAS  DATA Step or SAS SQL? Traditionally, the only way to merge files in SAS was via the SAS DATA Step. Now SAS provides a Structured Query Language (SQL) facility which also merges files. This tutorial compares and contrasts these two merge facilities. It examines the pros and cons of each merge technique. It looks at DATA Step code to perform specific merges an...

The activation of Wnt signaling has been reported in many types of squamous cell carcinoma. In this study, using human oral squamous cell carcinoma (OSCC) cells with different metastatic potential, we investigated the involvement of Wnt signaling in metastasis. Further, we aimed to elucidate the characteristic biological features related to high metastatic potential and to identify new target m...

Medicare Encounter data is received by each state’s Peer Review Organization as an Oracle database known as the SDPS (Standard Data Processing System) data set. This data set is used for quality improvement projects, integrity investigations, and research. This data set is then queried with SAS software and the SAS SQL pass-through facility. Often the criteria for selecting data from the SDPS d...

BACKGROUND Several studies have been attempting to ascertain the risks of Sleep Apnea Syndrome (SAS) and its morbidity and mortality. OBJECTIVE The main objective was to verify whether SAS increases the risk of death; the secondary objective was to evaluate its morbidity in relation to cardiovascular disease and the number of days hospitalized. METHODS A systematic review and a meta-analysi...

Purpose – The purpose of this paper is to examine how consumers respond differently to “scratch and save (SAS)” promotions versus “tensile price claims (TPC).” SAS promotions provide a possible discount (determined probabilistically) but conceal the exact amount until purchase. Tensile price claims (e.g. “up to 25 percent off on items marked with a red tag”) make imprecise price promotional cla...

BACKGROUND Boron neutron capture therapy (BNCT) is a selective radiotherapy, being effective for the treatment of even advanced malignancies in head and neck regions as well as brain tumors and skin melanomas. To clarify the role of p53 gene, the effect of BNCT on oral squamous cell carcinoma (SCC) cells showing either wild- (SAS/neo) or mutant-type (SAS/mp53) p53 was examined. METHODS Cells ...

SAS sometimes provides an optimal environment for part of an assignment but third-party applications provide a better environment for other parts. The creation of report-quality statistical tables is such a situation. SAS is optimal for statistics but clumsy for publishing report-quality tables. XML offers a new way to integrate SAS with publishing software. To implement, SAS was taught a stand...