purpose: this study aimed to evaluate risk factors associated with threshold retinopathy of prematurity (rop) in premature infants referred to farabi eye hospital during 2008-2009. since blindness and sever visual impairments will occur in a high percentage of infants stricken with threshold retinopathy, we intended to examine relationship between demographic factors and threshold retinopathy i...

The first-hitting-time based model conceptualizes a random process for subjects’ latent health status. time-to-event outcome is modeled as the first hitting time of to pre-specified threshold. Threshold regression with linear predictors has numerous benefits in causal survival analysis, such estimators’ collapsibility. We propose neural network extension threshold model. With flexibility networ...

Regression discontinuity analyses can generate estimates of the causal effects of an exposure when a continuously measured variable is used to assign the exposure to individuals based on a threshold rule. Individuals just above the threshold are expected to be similar in their distribution of measured and unmeasured baseline covariates to individuals just below the threshold, resulting in excha...