Peyman Jafari

Summary

Country: UK

Publications

  1. pmc Effects of age and leg length upon central loop of the gastrocnemius-soleus H-reflex latency
    Shahram Sadeghi
    Pain Research Group, multidisciplinary pain clinic of iran jahad danesh gahi, No 31, karimkhan zand ave shahid hosseini alley, Tehran, Iran
    BMC Neurol 4:11. 2004
  2. pmc A high prevalence of cumulative trauma disorders in Iranian instrumentalists
    Shahram Sadeghi
    Pain Research Group, Academic Centre for Education, Culture and Research, Iran medical science branch, No 31, Karimkhan zand Avenue, shahid hosseini alley, Multidisciplinary Pain Clinic, Tehran, Iran
    BMC Musculoskelet Disord 5:35. 2004
  3. pmc Sequential boundaries approach in clinical trials with unequal allocation ratios
    Peyman Jafari
    Department of Biostatistics and Epidemiology, Faculty of Health, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Med Res Methodol 6:1. 2006
  4. pmc DLQI scores in vitiligo: reliability and validity of the Persian version
    Shahin Aghaei
    Department of Dermatology, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Dermatol 4:8. 2004
  5. pmc Using Rasch rating scale model to reassess the psychometric properties of the Persian version of the PedsQL™ 4.0 Generic Core Scales in school children
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Health Qual Life Outcomes 10:27. 2012
  6. pmc Assessing whether parents and children perceive the meaning of the items in the PedsQLTM 4.0 quality of life instrument consistently: a differential item functioning analysis
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz
    Glob J Health Sci 5:80-8. 2013
  7. pmc Item and response-category functioning of the Persian version of the KIDSCREEN-27: Rasch partial credit model
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Health Qual Life Outcomes 10:127. 2012
  8. doi request reprint Validity and reliability of Persian version of Chronic Liver Disease Questionnaire (CLDQ)
    Hilda Mahmoudi
    Anesthesiology and Critical Care Research Center, Anesthesia Department, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res 21:1479-85. 2012
  9. pmc A Simulation Study to Assess the Effect of the Number of Response Categories on the Power of Ordinal Logistic Regression for Differential Item Functioning Analysis in Rating Scales
    Elahe Allahyari
    Department of Biostatistics, Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
    Comput Math Methods Med 2016:5080826. 2016
  10. doi request reprint Item-level informant discrepancies across obese-overweight children and their parents on the PedsQL™ 4.0 instrument: an iterative hybrid ordinal logistic regression
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res 25:25-33. 2016

Collaborators

  • Zahra Bagheri
  • Farkhondeh Sharif
  • Dejan Stevanovic
  • Marziyeh Doostfatemeh
  • Hilda Mahmoudi
  • Shahram Sadeghi
  • Farideh Vaziri
  • Elahe Allahyari
  • Jamshid Jamali
  • Seyyed Mohammad Taghi Ayatollahi
  • Sina Ghaffaripour
  • Shahin Aghaei
  • Zohreh Tavana
  • Mohammad Hossein Dabbaghmanesh
  • Samira Nasiri
  • Seyyed Mohammad Taghi Ayatollah
  • Siyavash Gholami
  • Seyed Ali Malek-Hosseini
  • Mahvash Alizadeh-Naini
  • Ali Bidari
  • Mohammadrezaalavian Ghavanini
  • Nazila Mazharinia
  • Seyed Mostafa Jazayeri Shooshtari
  • Alireza Ashraf
  • Behrooz Kazemi
  • Andrew Y Finlay
  • Manouchehr Sodaifi

Detail Information

Publications22

  1. pmc Effects of age and leg length upon central loop of the gastrocnemius-soleus H-reflex latency
    Shahram Sadeghi
    Pain Research Group, multidisciplinary pain clinic of iran jahad danesh gahi, No 31, karimkhan zand ave shahid hosseini alley, Tehran, Iran
    BMC Neurol 4:11. 2004
    ..This study has been performed to determine the influence of leg length and age on Tc among a carefully selected group of healthy volunteers...
  2. pmc A high prevalence of cumulative trauma disorders in Iranian instrumentalists
    Shahram Sadeghi
    Pain Research Group, Academic Centre for Education, Culture and Research, Iran medical science branch, No 31, Karimkhan zand Avenue, shahid hosseini alley, Multidisciplinary Pain Clinic, Tehran, Iran
    BMC Musculoskelet Disord 5:35. 2004
    ..We proposed this study to determine the prevalence of CTDs in amateur music students playing one of the two traditional Iranian instruments: Daf and Setar...
  3. pmc Sequential boundaries approach in clinical trials with unequal allocation ratios
    Peyman Jafari
    Department of Biostatistics and Epidemiology, Faculty of Health, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Med Res Methodol 6:1. 2006
    ..Our aim was to compare sequential boundaries approach with the SSD when the allocation ratio (R) was not equal...
  4. pmc DLQI scores in vitiligo: reliability and validity of the Persian version
    Shahin Aghaei
    Department of Dermatology, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Dermatol 4:8. 2004
    ..The objective of this study was to translate and to test the reliability and validity of the 10-item Dermatology Life Quality Index (DLQI) questionnaire in Iranian patients with vitiligo...
  5. pmc Using Rasch rating scale model to reassess the psychometric properties of the Persian version of the PedsQL™ 4.0 Generic Core Scales in school children
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Health Qual Life Outcomes 10:27. 2012
    ..The present study used the Rasch rating scale model (RSM) to examine and reassess the psychometric properties of the Persian version of the PedsQL™ 4.0 Generic Core Scales...
  6. pmc Assessing whether parents and children perceive the meaning of the items in the PedsQLTM 4.0 quality of life instrument consistently: a differential item functioning analysis
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz
    Glob J Health Sci 5:80-8. 2013
    ..Parents and children interpret certain items of the PedsQLTM 4.0 in a different ways, except for the social subscale. Hence, we should be cautious about using parent proxy-report as a substitute for a child's ratings. ..
  7. pmc Item and response-category functioning of the Persian version of the KIDSCREEN-27: Rasch partial credit model
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Health Qual Life Outcomes 10:127. 2012
    ..Moreover, we aimed to determine if all the items contributed adequately to their own domain...
  8. doi request reprint Validity and reliability of Persian version of Chronic Liver Disease Questionnaire (CLDQ)
    Hilda Mahmoudi
    Anesthesiology and Critical Care Research Center, Anesthesia Department, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res 21:1479-85. 2012
    ..The aim of this study is to test the psychometric properties of the Persian version of the Chronic Liver Disease Questionnaire (CLDQ) in Iranian candidates for liver transplantation...
  9. pmc A Simulation Study to Assess the Effect of the Number of Response Categories on the Power of Ordinal Logistic Regression for Differential Item Functioning Analysis in Rating Scales
    Elahe Allahyari
    Department of Biostatistics, Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
    Comput Math Methods Med 2016:5080826. 2016
    ..The clearest conclusion from this research is that the minimum number of response categories for DIF analysis using OLR is five. However, the impact of the number of response categories in detecting DIF was lower than might be expected. ..
  10. doi request reprint Item-level informant discrepancies across obese-overweight children and their parents on the PedsQL™ 4.0 instrument: an iterative hybrid ordinal logistic regression
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res 25:25-33. 2016
    ..This study aimed to assess measurement equivalence of the PedsQL™ 4.0 across obese-overweight children and their parents...
  11. doi request reprint Validation of the Persian version of COOP/WONCA functional health status charts in liver transplant candidates
    Hilda Mahmoudi
    Shiraz University of Medical Sciences, Shiraz, Iran
    Prog Transplant 24:126-31. 2014
    ....
  12. ncbi request reprint Testing whether patients with diabetes and healthy people perceive the meaning of the items in the Persian version of the SF-36 questionnaire similarly: a differential item functioning analysis
    Zahra Bagheri
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res . 2016
    ..This study aimed to examine DIF in the SF-36 questionnaire and its effect on comparing HRQoL scores between patients with diabetes and healthy people...
  13. doi request reprint Power and Sample Size Calculations in Clinical Trials with Patient-Reported Outcomes under Equal and Unequal Group Sizes Based on Graded Response Model: A Simulation Study
    Marziyeh Doostfatemeh
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Value Health 19:639-47. 2016
    ....
  14. pmc A randomized controlled trial of vitamin D supplementation on perinatal depression: in Iranian pregnant mothers
    Farideh Vaziri
    Department of Midwifery, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Pregnancy Childbirth 16:239. 2016
    ..This study evaluated the effect of vitamin D3 supplementation on perinatal depression scores...
  15. pmc A New Measurement Equivalence Technique Based on Latent Class Regression as Compared with Multiple Indicators Multiple Causes
    Jamshid Jamali
    Department of Biostatistics, Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
    Acta Inform Med 24:168-71. 2016
    ..In most methods used for assessing measurement equivalence, which is known as Differential Item Functioning (DIF), latent variables are assumed to be continuous...
  16. doi request reprint Testing measurement equivalence of the SF-36 questionnaire across patients on hemodialysis and healthy people
    Zahra Bagheri
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Int Urol Nephrol 47:2013-21. 2015
    ..This study aimed to assess DIF in the SF-36 questionnaire and its effect on comparing HRQoL scores across patients on HD and healthy people...
  17. doi request reprint Cross-cultural Measurement Equivalence of the KINDL Questionnaire for Quality of Life Assessment in Children and Adolescents
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Child Psychiatry Hum Dev 47:291-304. 2016
    ..Moreover, 20 out of 24 (83%) in the proxy reports of the both Kid-KINDL and Kiddo-KINDL, showed DIF across two samples. Accordingly, considerable caution is warranted when using the KINDL for cross-cultural comparisons...
  18. doi request reprint Testing parent dyad interchangeability in the parent proxy-report of PedsQL™ 4.0: a differential item functioning analysis
    Marziyeh Doostfatemeh
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Qual Life Res 24:1939-47. 2015
    ..This study aims to test the potential interchangeability of parent dyads in reporting children's HRQoL on both item and scale levels of the PedsQL™ 4.0 instrument, using the approach of differential item functioning (DIF)...
  19. pmc Assessing whether measurement invariance of the KIDSCREEN-27 across child-parent dyad depends on the child gender: a multiple group confirmatory factor analysis
    Zahra Bagheri
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Glob J Health Sci 6:142-53. 2014
    ....
  20. doi request reprint Measurement equivalence of the KINDL questionnaire across child self-reports and parent proxy-reports: a comparison between item response theory and ordinal logistic regression
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Child Psychiatry Hum Dev 45:369-76. 2014
    ..This study revealed that parent proxy-reports cannot be used as a substitute for a child's ratings in the KINDL. ..
  21. pmc Comparison of three tests of homogeneity of odds ratios in multicenter trials with unequal sample sizes within and among centers
    Zahra Bagheri
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    BMC Med Res Methodol 11:58. 2011
    ....
  22. pmc Health related quality of life of Iranian children with type 1 diabetes: reliability and validity of the Persian version of the PedsQL™ Generic Core Scales and Diabetes Module
    Peyman Jafari
    Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
    Health Qual Life Outcomes 9:104. 2011
    ..0 Generic Core Scales and the PedsQL™ 3.0 Diabetes Module...