Effect of nutritional guidance on employee work ability, work well-being and quality of life (RAVI trial): Study protocol for a randomized controlled trial

The minority of working-age Finns eat according to the national and Nordic nutritional guidelines and increasing numbers of health problems affect the Finnish workforce. Coincidently recruiting new workers in the more rural areas of Finland, such as Satakunta, has been problematic. To optimize the use of the existing workforce, health promotion interventions focusing on nutrition have been suggested to improve the health and well-being of the current working age Finns. The aim of this RCT study is to assess the effectiveness of a 12-month multifactorial nutritional guidance intervention to improve work ability (performance), work well-being, health-related quality of life, work productivity, sickness absence, dietary intake and eating habits. In total, six small or medium-sized companies and their employees (n = 170) from the Satakunta region will be recruited. Companies will be randomized 1:1 to a 12-month multifactorial nutritional guidance intervention group (INT) or a control group (CG). Comprehensive measurements are taken before randomization (baseline) and at the end of the 12-month study period. Primary outcomes (work ability, work well-being and health-related quality of life) are measured with Work Ability Index, Utrecht Work Engagement Scale short questionnaire and EQ-5D. Dietary intake and eating habits are measured with 3-day food records and Food Frequency Questionnaire (FFQ). This study will provide nationally important data on how workplace nutrition guidance affects work-related outcomes, quality of life, and nutritional and overall health status among working age Finns.