Objective(s): One of the effective programs in the prevention of musculoskeletal disorders among nursing assistants is the use of educational interventions on patient handling. The aim of this study was evaluating the effect of patient handling training based on Precede-Proceed model on musculoskeletal disorders among nursing assistants.
Methods: This was a semi-experimental study conducted in 1401 on nurses working in a hospital in Kermanshah province, Iran.  in the three stages before, one and three months after the intervention. The data collection tools included a demographic questionnaire, the Nordic questionnaire, the body map scale, a visual analog scale and a musculoskeletal disorders prevention behaviors questionnaire including items based on the Precede-Proceed model. Data analysis was done in SPSS software.
Results: In all 100 nurses were entered into the study (50 nurses per each group). Before the intervention, there was a significant difference in the rate and intensity of musculoskeletal disorders between the intervention and control groups only in some parts of the body, but after the intervention, there was a significant difference in the rate and intensity of the disorders between the two groups in all areas (P-value <0.05) indicating the improvement in intervention group. Before the intervention, there was no significant difference between the score of knowledge, attitude, self-efficacy, reinforcing and enabling factors and behavior in the intervention and control groups (P-value>0.05), but after intervention, these scores had significant differences between the two groups (P-value<0.05) showing improvements in the intervention group.
Conclusion: The patient handling training based on the Precede-Proceed model had a significant effect in reducing the rate and severity of musculoskeletal disorders. Conducting more studies on a larger sample is recommended.