> Those behavioral changes resulted in 35% lower health-care spending than when the same employees were enrolled in traditional health insurance. Even better, the study found that employees enrolled in the deductible security plan were going in for mammograms, annual check ups, and other forms or preventive medicine at the same rate as when they were enrolled in traditional insurance. Thus, these cost savings are real and not due to people delaying necessary care in order to hoard their HSA balances.