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Effect of Heat-Illness Prevention Education on Heat-Protective Practices among Outdoor Workers in Nigeria

Abstract

Heat exposure is an important occupational and public health concern among outdoor workers in Nigeria because prolonged exposure to high temperatures and direct sunlight may increase the risk of heat-related illnesses. Outdoor workers such as construction workers, agricultural workers, road workers, waste management workers, street vendors, security personnel, and other workers who spend extended periods outdoors may be particularly vulnerable to heat stress, dehydration, heat exhaustion, and heat stroke. Factors such as prolonged working hours, inadequate rest periods, limited access to drinking water, heavy physical exertion, protective clothing, high humidity, and limited awareness of heat-related hazards may further increase workers' vulnerability. Heat-illness prevention education provides workers with knowledge and practical skills relating to recognition of heat-related symptoms, hydration, appropriate clothing, rest and shade, work scheduling, acclimatization, early response to heat-related symptoms, and appropriate first-aid measures. Heat-protective practices refer to behaviours adopted by outdoor workers to reduce exposure to excessive heat and prevent heat-related illness, including adequate fluid intake, use of shade, appropriate rest breaks, suitable clothing, avoidance of excessive heat exposure, appropriate scheduling of strenuous tasks, recognition of warning symptoms, and prompt response to heat-related illness. In Nigeria, inadequate awareness of occupational heat risks, limited access to water and shaded rest areas, demanding work schedules, and insufficient workplace heat-management programmes may affect the adoption of appropriate heat-protective practices. Effective heat-illness prevention education may improve workers' knowledge, risk perception, practical skills, and adoption of recommended heat-protective behaviours. Against this background, this study investigates the effect of heat-illness prevention education on heat-protective practices among outdoor workers in Nigeria. The study is anchored on the Health Belief Model, Social Cognitive Theory, and Knowledge-Attitude-Practice framework. The Health Belief Model explains preventive health behaviour through perceived susceptibility, perceived severity, perceived benefits, perceived barriers, and cues to action, providing a basis for understanding outdoor workers' adoption of heat-protective practices. Social Cognitive Theory emphasizes the interaction between knowledge, self-efficacy, behavioural capabilities, social influences, and environmental conditions in shaping occupational health behaviour. The Knowledge-Attitude-Practice framework provides a basis for examining how improved knowledge and attitudes resulting from heat-illness prevention education may influence heat-protective practices. Collectively, these theoretical perspectives provide a suitable framework for explaining how heat-illness prevention education may influence heat-protective practices among outdoor workers in Nigeria. The study will adopt a quantitative quasi-experimental research design. Primary data will be collected from outdoor workers in selected occupational settings and communities in Nigeria using a structured interviewer-administered questionnaire, heat-illness knowledge assessment, and an observational heat-protective practices checklist. A multistage sampling technique will be employed to select states, local government areas, occupational groups, workplaces or work locations, and eligible outdoor workers. Where feasible, selected worker groups or workplaces will be assigned to intervention and comparison groups. Workers in the intervention group will receive structured heat-illness prevention education covering occupational heat hazards, signs and symptoms of heat-related illness, hydration, appropriate clothing, use of shade, work-rest schedules, acclimatization, safe scheduling of strenuous activities, early recognition of heat stress, first-aid response, and appropriate procedures for seeking medical attention. Heat-protective practices will be assessed using indicators such as adequate fluid intake, regular use of shaded or cool rest areas, appropriate rest breaks, suitable clothing, adjustment of work activities during periods of excessive heat, recognition of heat-related symptoms, and prompt action when symptoms occur. Descriptive statistics will be used to summarize workers' sociodemographic and occupational characteristics, heat-illness knowledge, exposure to education, and heat-protective practices. Inferential statistical techniques, including chi-square tests, paired-sample tests, independent-sample tests, and logistic or multiple regression analysis, will be used to determine the effect of heat-illness prevention education on heat-protective practices. Where appropriate, pre-intervention and post-intervention practice scores will be compared. Diagnostic tests will also be conducted to assess the reliability of the research instruments, model assumptions, goodness of fit, and robustness of the findings. The study is expected to find that heat-illness prevention education has a significant positive effect on heat-protective practices among outdoor workers in Nigeria. Workers exposed to structured heat-illness prevention education are expected to demonstrate improved knowledge of heat-related hazards and greater adoption of recommended protective practices. Education may increase workers' awareness of the importance of adequate hydration, appropriate rest breaks, use of shade, suitable clothing, safe work scheduling, and early recognition of heat-related symptoms. It may also improve workers' ability to respond promptly when signs of heat stress or heat-related illness occur. However, education alone may not guarantee sustained heat-protective practices because workers may continue to face barriers such as limited access to clean drinking water, inadequate shaded rest areas, demanding work schedules, productivity pressures, lack of appropriate protective clothing, and limited employer support. Consequently, heat-illness prevention education is expected to be most effective when supported by workplace heat-management policies, accessible drinking water, shaded rest facilities, appropriate work-rest schedules, occupational health monitoring, and employer commitment to worker safety. The study is expected to contribute to the literature on occupational heat exposure, heat-related illness prevention, occupational health, workplace safety, environmental health, health education, climate-related health risks, and public health in Nigeria by providing empirical evidence on the effect of heat-illness prevention education on heat-protective practices among outdoor workers. The findings will provide useful information to the Federal Ministry of Labour and Employment, Federal Ministry of Health and Social Welfare, state ministries of health and labour, employers, occupational health professionals, workplace safety officers, environmental health practitioners, public health practitioners, workers' associations, development partners, and policymakers regarding strategies for reducing occupational heat-related health risks. The study will also provide evidence-based recommendations for integrating heat-illness prevention education into workplace health programmes, improving access to drinking water and shaded rest areas, implementing appropriate work-rest schedules, strengthening occupational heat monitoring, promoting heat-health awareness, and protecting outdoor workers from the increasing health risks associated with occupational heat exposure in Nigeria.

Keywords: Heat-illness prevention education, heat-protective practices, outdoor workers, occupational heat exposure, heat stress, heat-related illness, occupational health, workplace safety, heat-health education, climate-related health risks, injury and illness prevention, public health, Nigeria.