PURPOSE To develop and validate a questionnaire for the measurement of the impact of contact lenses on quality of life (QoL): The Contact Lens Impact on Quality of Life (CLIQ) Questionnaire. METHODS The questionnaire was developed and validated using conventional methods and Rasch analysis to assure content validity, repeatability, construct validity, and low respondent burden. Item identific...

Cephalometric lateral radiography is an important paraclinical tool in diagnosing and treatment design of skeletaldental malocclusions. Objective of this study is to determine accuracy amount of measurements of cephalometry in two types of digital and ordinary graphy to specify the more beneficial method having more accuracy. In this descriptive-analytical study samples include digital and ordi...

Purpose: The paper aims at finding out the movement of certain macro-economic variables in India. The variables are FDI inflow, GDP, Market rate and CPI Inflation rate. Design/Methodology: To study the linear relationship, the paper uses simple correlation coefficient and coefficient of determination. Along with it, for further prediction regression analysis is used. For an overview, measures o...

Scale-free (SF) networks exhibiting a power-law degree distribution can be grouped into the assortative, dissortative, and neutral networks according to the behavior of the degree-degree correlation coefficient. Here we investigate the betweenness centrality (BC) correlation for each type of SF networks. While the BC-BC correlation coefficients behave similarly to the degree-degree correlation ...

The sample correlation coefficient R is almost universally used to estimate the population correlation coefficient p. If the pair (X, Y)has a bivariate normal distribution, this would not cause any trouble. However, if the marginals are nonnormal, particularly if they have high skewness and kurtosis, the estimated value from a sample may be quite different from the population correlation coeffi...