BACKGROUND Poor reproducibility of an outcome measure reduces power and, in an independent variable, biases results. The intraclass correlation coefficient measures loss of power and degree of bias. Information is lacking on the intraclass correlation coefficient for bronchial responsiveness and factors affecting reproducibility. METHODS Papers containing information on reproducibility of bro...

Background: Parenting style is associated with children's health-related behaviors. One of the popularity and applicability assessment tools is Parenting Style and Dimensions Questionnaire (PSDQ) that the lack of Iranian version can be seen.This study was conducted to determine the validity and reliability of Iranian version of PSDQ.Materials and Methods: This study was done with randomized clu...

g a dynamic ntries and the d from 1990 to 2003. The empirical results find supportive evidence of a contagion effect. By analyzing the correlation-coefficient series, this paper the Asian crisis. The first phase shows an increase in correlation (contagion) and the second phase shows continued high correlation (herding). Statistical ll as in the variance of the correlation coefficients, casting ...

The correlation between delta differences for 20 serum chemistry tests was calculated for 2400 samples from 288 patients. There were 12 pairs of chemistry tests for which correlation coefficients of the delta checks exceeded 0.25; aspartate aminotransferase and alanine aminotransferase had the highest Pearson correlation coefficient, 0.915. The highest negative, indirect, correlation was betwee...

Moyamoya patients underwent cerebral revascularization surgery had higher risk for postoperative complications. Cerebral autoregulation impaired may be the main mechanism for postoperative complications. In our study, we used correlation coefficient r between cerebral tissue oxygenation index (TOI) and mean arterial blood pressure (MAP) to assessing of cerebral autoregulation. Total 30 moyamoya...

limited water for irrigation and the coincidence of early growth of sugar beet (beta vulgaris l.) with the late growth of winter cereals in the northeast (ne) of iran, force farmers, to allocate their limited irrigation water to the cereal crops and thus their sugar beet crop is subjected to an early water stress. finding cultivars which are able to withstand early water stress without a si...

An experimental investigation was conducted to study the average and the fully-developed heat (mass) transfer coefficients in a rectangular smooth duct and a duct with repeated-baffle blockages. The focus of attention in this work is the conventional correlation Nu / Nufd 1 + C / ( X / D ) for the average heat transfer coefficient. It was shown that for relatively short ducts, the coefficient C...

Calling the quantity; 2ΔAΔB/|<[A, B]>|, with non-zero denominator, the uncertainty product ratio or UPR for the pair of observables, (A, B), it is shown that any non-zero correlation coefficient between two observables raises, above unity, the lower bound of the UPR for each member of an infinite collection of pairs of incompatible observables. Conversely, any UPR is subject to lower bounds abo...