The U.S. spends huge amounts of money on health care that does little or nothing to help patients, and may even harm them. In Colorado, a new analysis shows that the number of tests and treatments conducted for which the risks and costs exceed the benefits has barely budged despite a decade-long attempt to tamp down on such care.

The state — including the government, insurers, and patients themselves — spent $134 million last year on what is called low-value care, according to the report by the Center for Improving Value in Health Care, a Denver nonprofit that collects billing data from health plans across Colorado. The top low-value items in terms of spending in each of the past three years were prescriptions for opiates, prescriptions for multiple antipsychotics, and screenings for vitamin D deficiency, according to the analysis.