Estimating treatment effects via propensity scores is a widespread method in the treatment evaluation literature. However, covariates are often measured with error, leading to biased propensity score estimates. Using validation data to correct for this measurement error is a persistent topic in the limited dependent variable context yet assuming the former to be a random subsample with respect ...

Despite the growing popularity of propensity score (PS) methods in epidemiology, relatively little has been written in the epidemiologic literature about the problem of variable selection for PS models. The authors present the results of two simulation studies designed to help epidemiologists gain insight into the variable selection problem in a PS analysis. The simulation studies illustrate ho...

background scapula fractures occur in approximately 1% of all fractures and constitute about 3% - 5% of all injuries of the shoulder joint. objectives this study aimed to evaluate the clinical outcomes of 20 surgically treated patients with displaced glenoid fractures after stabilization with distal radius plate. methods between 2012 and 2015, at 2 centers (hmch & shce) of bhubaneswar odisha, w...

introduction : pregnancy as a stressful event may cause some consequence for both mother and infant such as low birth weight (lbw). lbw is seen in about 7% of pregnancies in iran. it was proved there is a correlation between infants weight and maternal social support. this study was designed to evaluate maternal perceived social support in lbw infants and infants with normal weight. methods and...

background and aims: tooth displacement changes the periodontium. the aim of orthodontic treatment was desired tooth movement with minimum side effects on the alveolar bone quality. the aim of the present study was to assess changes of alveolar trabeculation among children, youth and adults and the two genders. materials and methods: in this cross-sectional study, 63 patients who had been treat...