Title: Application of Longitudinal Latent Regression Model (LLRM) for evaluating the Quality of Life (QoL) in Blind War Veterans

QoL can be an important index for determining the social status and performance evaluation of presented services. The main goal of this article is to show the application of longitudinal latent regression model for evaluating the quality of life and assessing the effect of time and other covariates.

This was a longitudinal study under 71 blind veterans. Under study population includes all blind war veterans that their data collected from SF36 questionnaire with assist of Foundation of martyrs and veterans affair during 2007، 2009 and 2011. SAS/9. 1. 1 software was used to analyze the data set.

Mean age and blindness long range (±SD) devotees were 48. 97 (±10. 655) and 25. 74 (±3. 692)، respectively، also they have 2 average additional ulcers with their blindness. Age and length of blindness except than additional disability (0. 046) were not statistically significant and the QoL has not meaningful change during the study time. Also variance component of the model were statistically significant. Discussion and

Result of this article shown that approximately half of devotees had low QoL. Whereas there was no significant time effect but the QoL of blind war in second and third year were lower than first year.