Stress hormone levels were measured using saliva samples during the day.
In the morning, there was no difference between the three groups.
But during the course of the work day, stress levels appeared to decline for employees with their dogs present and increased for non-pet owners and dog owners who did not bring their dogs to work.
I'd like to see more systematic work done on what causes or prevents rises in stress hormone levels while at work. Like, just how many dogs are needed for a stress-free work environment? Also, what breeds to the best job of keeping everyone relaxed and calm? Do some breeds do a better job with relieving stress of non-owners? Does a requirement for leashes in offices prevent the dogs from relieving stress of non-owners? These are important questions.