Document Type : Original Article


Department of Health Education, School of Public Health, Iran University of Medical Sciences, Tehran, Iran


BACKGROUND: Many accidents in industries occur due to unsafe practices and unsafe conditions.
Occupational accidents endanger the health of workers and impose excessive costs on the employers.
This study was designed and conducted to evaluate and implement a behavior‑based safety approach
in an industrial workplace based on the theory of planned behavior.
MATERIALS AND METHODS: The present study was a quasi‑experimental study performed on 90
supervisors of an industrial workplace. Behavior‑based safety interventions were performed based
on the components of the theory of planned behavior using nine strategies of health education and
health promotion, including skills training, participation, and social support. The data collection tool
consisted of a researcher‑made questionnaire that was answered by the supervisors before and
6 months after the intervention. The collected data were evaluated using SPSS 22 software. The
significance level was considered 0.05.
RESULTS: The results showed that the constructs of subjective norms, attitude, and perceived
control of behavior predict the safe behavior of supervisors. After behavior‑based safety interventions,
significant changes were observed in subjective norms, intention, attitude, and perceived control of
behavior (P < 0.001) compared to before the intervention.
CONCLUSION: The results of this study showed the improvement of safe behavior of supervisors
in the workplace due to behavioral‑based safety interventions using the theory of planned behavior.
Accordingly, this theory can be used as a suitable theoretical framework for designing and
implementing interventions to promote safe behaviors of employees in the workplace.


1. Schall MC Jr., Sesek RF, Cavuoto LA. Barriers to the adoption
of wearable sensors in the workplace: A survey of occupational
safety and health professionals. Hum Factors 2018;60:351‑62.
2. Gurses AP, Dietz AS, Nowakowski E, Andonian J, Schiffhauer M,
BillmanC, et al. Beni mprove the safety of doffing enhanced personal
protective equipment. Infect Control Hosp Epidemiol 2019;40:178‑86.
3. Baybutt P. Cognitive biases in process hazard analysis. J Loss
Prev Process Ind 2016;43:372‑7.
4. BeselerCL, StallonesL. Safety knowledge, safety behaviors, depression,
and injuries in Colorado farm residents. Am J Ind Med 2010;53:47‑54.
5. Han S, Lee S. A vision‑based motion capture and recognition
framework for behavior‑based safety management. Autom Constr
6. Javadi M, Kadkhodaee M, Yaghoubi M, Maroufi M, Shams A.
Applying theory of planned behavior in predicting of patient
safety behaviors of nurses. Mater Sociomed 2013;25:52‑5.
7. Motamedzade M, Dormohammadi A, Amjad SH, Zarei E,
Dormohammadi R, Shafii MM. The role of ergonomic design and
application of NIOSH method in improving the safety of load
lifting tasks. J Arak Uni Med Sci.2013; 16:90‑100.
8. Zhang P, Li N, Fang D, Wu H. Supervisor‑focused behavior‑based
safety method for the construction industry: Case study in Hong
Kong. J Constr Eng Manage 2017;143:5‑17.
9. Stiehl E, Shivaprakash N, Thatcher E, Ornelas IJ, Kneipp S,
Baron SL, et al. Worksite health promotion for low‑wage workers:
A scoping literature review. Am J Health Promot 2018;32:359‑73.
10. Yzer M. Theory of reasoned action and theory of planned
behavior. Int Encyclopedia Media Eff 2017; 29:1‑7.
11. McEachan RR, Conner M, Taylor NJ, Lawton RJ. Prospective
prediction of health‑related behaviours with the theory of planned
behaviour: A meta‑analysis. Health Psychol Rev 2011;5:97‑144.
12. Ajzen I. The Theory of Planned Behaviour: Reactions and
Reflections. Psychology & Health; 2011.29: 1113‑1127. Doi:
13. Sabouri M, Shakibazadeh E, Mohebbi B, Tol A, Yaseri M, Babaee S.
Effectiveness of an educational intervention using theory of
planned behavior on health care empowerment among married
reproductive‑age women: A randomized controlled trial. J Educ
Health Promot 2020;9:293.
14. Lawshe C. A quantitative approach to content validity. Pers
Psychol 1975;28:563‑75.
15. Baumgartner TA, Chung H. Confidence limits for intraclass
reliability coefficients. Meas Phys Educ Exerc Sci 2001;5:179‑88.
16. Cronbach LJ. Coefficient alpha and the internal structure of tests.
Psychometrika 1951;16:297‑334.
17. Somoray K, Newton C, Lewis I, Wishart D, editors. Development
of Proactive Safety Behaviour Scale within the Work Driving
Context. n: Arezes P. (eds) Advances in Safety Management and
Human Factors. AHFE 2018. Advances in Intelligent Systems and
Computing, vol 791. Springer, Cham.
978‑3‑319‑94589‑7_46; 2018.
18. Yadav R, Pathak GS. Young consumers’ intention towards buying
green products in a developing nation: Extending the theory of
planned behavior. J Clean Prod 2016;135:732‑9.
19. Gao L, Wang S, Li J, Li H. Application of the extended theory
of planned behavior to understand individual’s energy saving
behavior in workplaces. Resour Conserv Recycl 2017;127:107‑13.
20. Shi H, Wang S, Zhao D. Exploring urban resident’s vehicular PM2.
5 reduction behavior intention: An application of the extended
theory of planned behavior. J Clean Prod 2017;147:603‑13.
21. Hurtado‑de‑Mendoza A, Carrera P, Parrott WG, Gómez‑Trillos S,
Perera RA, Sheppard VB. Applying the theory of planned
behavior to examine adjuvant endocrine therapy adherence
intentions. Psychooncology 2019;28:187‑94.
22. Jamehei F, Ostovar A, Javadzade H. Predictors of exclusive
breastfeeding among nulliparous Iranian mothers: Application
of the theory of planned behavior. Int J Pediatr 2017;5: 4457‑4467.
23. Gao Y, Chen X, Shan X, Fu Z. Active commuting among junior
high school students in a Chinese medium‑sized city: Application
of the theory of planned behavior. Transportation research part F:
Traffic Psychol Behav 2018;56:46‑53.
24. Fogarty GJ, Shaw A. Safety climate and the theory of planned
behavior: Towards the prediction of unsafe behavior. Accid Anal
Prev 2010;42:1455‑9.
25. Meng X, Chan AH, Lui LK, Fang Y. Effects of individual and
organizational factors on safety consciousness and safety
citizenship behavior of construction workers: A comparative
study between Hong Kong and Mainland China. Saf Sci
26. Almeida FA, Wall SS, YouW, Harden SM, HillJL, Krippendorf BE,
et al. The association between worksite physical environment and
employee nutrition, and physical activity behavior and weight
status. J Occup Environ Med 2014;56:779‑84.
27. Greaves M, Zibarras LD, Stride C. Using the theory of planned
behavior to explore environmental behavioral intentions in the
workplace. J Environ Psychol 2013;34:109‑20.
28. Mohammadfam I, Ghasemi F, Kalatpour O, Moghimbeigi A.
Constructing a Bayesian network model for improving safety
behavior of employees at workplaces. Appl Ergon 2017;58:35‑47.