Study population
A randomsample of 828 participants aged 18–64 yearswere recruited
fromthe selectedworkplaces (workplace A: 100 (70% response rate),
workplace B: 224 (70% response rate), workplace C: 392 (60% response
rate),workplace D: 112 (91% response rate)). The number of employees
recruited per workplace reflected the difference in company size. The
sample was powered to detect a decrease in BMI by 1 kg/m2 and a 2 g
average fall in dietary salt intake between the control and intervention
groups post-delivery of the interventions. Eligible employees were permanent,
full-timeemployeeswho purchased and consumed at least one
daily meal at work. A wide variety of hot and cold meal options were
available for employees during working hours. Many food options
were served using a buffet-style so employees' managed the frequency
and quantity of their own food items.