The goal of this study was to examine the possible relationship between nutritional quality, adherence to Mediterranean diet and shift work.
Methods
Our project consists of five steps: 1) evaluation of anthropometric parameters (height, weight, abdominal circumference) for each worker; 2) administration of two proper questionnaires about diet, sleep, shift schedules and health; 3) collective meetings focused on nutrition, lifestyle and sleep hygiene; 4) individual dietitian consultations for obese workers; 5) revaluation of the first step at 12 and 24 months after the interventions
Results
Seventy-nine out of 100 were shift workers. Body mass index was significantly higher among shift workers than among day workers. Accordingly, nutritional quality was significantly worst among shift workers with respect to day workers. Indeed, only 28% of the shift workers reported to consume at least 2 portions of vegetables per day with respect to 46% among the day workers (p<0.0001). Similarly, shift workers reported to consume significantly less fruits and fish than day workers (18% vs. 38%; p<0.0001 and 9.5% vs. 28%; p<0.0001, respectively). On the other hand, shift workers reported to consume more dairy products and red and processed meat than day workers. In particular, processed meat’s consumption increased significantly in relation with the increasing number of night shifts. All these food variables’ consumption determined a lower adherence to Mediterranean diet among shift workers with respect to day workers. Obese workers have reported - as a mean of the period 2006-2010 - an higher number of missing working days, work and road accidents (particularly related to sleepiness), working injuries, falling asleep and gastrointestinal disorders (p<.005 for all mentioned factors).
Discussion
Nutritional quality is worst among shift workers and during night shifts with respect to day workers. This profile can contribute to a worst risk profile in terms of cardiovascular and metabolic diseases