Validity and Reliability of 'Objective Structured Assessment of Technical Skills' (OSATS) for Vaginal Delivery

OSATS for Normal delivery

Authors

Jaweria Faisal Akhtar Saeed Medical college & Farooq Hospital Rawalpindi

DOI:

https://doi.org/10.51273/esc24.25132024

Keywords:

Cronbach's alpha, Validity, OSATS, Reliability, Workplace-based assessment.

Abstract

Objective: To assess validity and reliability metrics of objective structured assessment of technical skills
(OSATS) for assessing the competence of technical skills of vaginal delivery
Materials and Methods: Co-relational reliability study, the validation study was conducted at the Department
of Obstetrics and Gynaecology of Akhtar Saeed Medical College and Farooq Hospital Rawalpindi from April
to December 2023. The study comprised nine candidates at different training levels (LHV, staff, postgraduate
trainees & senior registrars), who were evaluated on OSATS by 8 evaluators over 54 NVD observations. Cronbach's
alpha and intraclass correlation coefficient (ICC) were used to estimate reliability metrics of OSATS scores.
The construct validity; that OSATS can measure and reveal the underlying construct, was determined by three
shreds of evidence; evidence of content, response process and internal structure, and evidence of improvement in
performance scores as the procedure-specific experience accrues with OSATS using linear mixed model and
evidence of the discriminatory power of the tool between various levels of the training program, with one-way ANOVA.
Results: The OSATS tool demonstrated good reliability metrics with Cronbach's alpha of 0.897 and good inter-
rater reliability calculated by intraclass correlation coefficient as 0.801. OSATS was validated as examinee
scores improved showing gradual progression on performance curves with succeeding OSATS encounters.
Validation also yielded that the tool can differentiate among different training levels with a p-value of 0.019
Conclusion: The OSATS tool was found to be valid and reliable for assessing the competence of technical skills of vaginal delivery.

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Published

2024-07-18

How to Cite

Faisal J. Validity and Reliability of ’Objective Structured Assessment of Technical Skills’ (OSATS) for Vaginal Delivery: OSATS for Normal delivery. Esculapio - JSIMS [Internet]. 2024 Jul. 18 [cited 2024 Dec. 21];20(2). Available from: https://esculapio.pk/journal/index.php/journal-files/article/view/1074