Longitudinal studies provide insights into the outcomes of medical training curriculum. However, few educational cohort studies have been conducted in Iran. This study aims first to evaluate the impact of the current curriculum on medical students' medium- and long-term academic and career outcomes and, second, to identify medical students' characteristics and how they change through the doctor of medicine programme.

This protocol outlines a multi-phase, prospective cohort study that will take place in Mashhad, Iran. The study will implement the Kirkpatrick model, investigating medical students' knowledge, skills, behaviour and professionalism development over 10 years. Approximately 1000 medical students will be recruited through peer invitations and social networks. Data will be collected through baseline and follow-up questionnaires, academic performance records and comprehensive test scores throughout the Doctor of Medicine (MD) programme.

The data from the questionnaires will be reported using a Likert scale. Quantitative data will be described using means and SD, while qualitative variables will be presented as frequencies and percentages. We will evaluate the relationship between quantitative variables using correlation coefficients and the relationship between qualitative variables via the ² or Fisher exact test. All tests will be two-sided, with a significance level set as p

All participants will complete written informed consent before data collection. All students can withdraw from the study at any time with no consequences. Results of this study will be presented at relevant conferences and will be submitted for publication in peer-reviewed journals. This study was approved by the Ethics Committee of Mashhad University of Medical Sciences.

IR.MUMS.REC.1400.311.

Musculoskeletal disorders (MSDs) in the workplace are a major health problem which is significantly related to the adverse effects on the workforce’s health in different occupations, including the petrochemical industry employees. Many health behaviors can play a significant role in preventing complications caused by MSDs; however, in developing countries such as Iran, there is a lack of clarity about the factors affecting the prevention of complications from these disorders from the perspective of petrochemical industry employees. This study aimed to investigate effective factors to prevent complications caused by MSDs in petrochemical industry workers in Iran.

This qualitative study was conducted using the conventional content analysis method. The data were collected using in-depth and unstructured interviews with 23 employees and managers of the petrochemical industry. In this study, the participants were selected from different industry centres using the purposeful sampling method and based on the maximum diversity (work duties, age, level of education). The collected data were then analysed using the initial matrix developed based on the available literature.

The analysis of the data from 23 interviews resulted in the identification of four main categories: educational-consultative support, organisational-management structure transformation, infrastructure security and physical environment redesign, and self-care necessity. These categories are the primary factors that influence the preventive behaviours related to MSDs among employees in the petrochemical industry.

The concepts that have emerged based on the results of this study can potentially help to develop comprehensive and appropriate training and health promotion programmes in creating, maintaining and promoting preventive behaviours of complications caused by MSDs in petrochemical industry workers.