Panomkorn Lhakum¹
1 Medical Education Center, Chiangrai Prachanukroh Hospital. 

Introduction 
Currently, the objective structured clinical examination (OSCE) was directed and observed by Examiner-physician (EP). Standardized-patient (SP) also played an important role in this field. The aim of this study was to compare FP and SP assessments of medical students in OSCE. 

Methods
To evaluate the assessment in OSCE of SP compare to EP scoring to medical students. The OSCE is designed to assess professionalism, communication skill, history taking, and physical examination. The OSCE consists of a 5-minute station. The fourth-year medical students were evaluated by both SP and EP. 

Results
The 42 fourth-year medical students were evaluated by the OSCE by both SP and EP. The OSCE mean score assessment was 76.59+9.39 by SP and 54.68+9.53 by EP. There was a significant difference in scoring between SP and FP with a P value <0.001. The interrater reliability between SP and FP was 4.75%, Kappa 0.035. Subgroup analysis in the professionalism domain of mean score assessment was 82.27+5.28 by SP and 81.25+5.12 by FP. There was no significant difference in scoring between SP and FP with P value =0.06. The interrater reliability between SP and FP was 56.36%, Kappa 0.453. 

Conclusion
The assessment of medical student OSCE by SP could not substitute EP. But there was a similar agreement in the professionalism domain. Well-trained SP should be warranted. 

Take home message
SP was able to assess medical student professionalism equally as well as EP. 

References (maximum three) 

Rouf E, Chumley H, Dobbie A. Patient-centered interviewing and student performance in a comprehensive clinical skills examination: is there an association? Patient Educ Couns. 2009 Apr;75(1):11-5. doi: 10.1016/j.pec.2008.09.016. Epub 2008 Nov 14. PMID: 19013743.