The latest diagnostic criteria for carpal tunnel comes from the recommendations of the National Institute of Occupational Safety and Health (NIOSH) for work-related carpal tunnel syndrome.
In diagnosing carpal tunnel syndrome, it should include two or more of the following criteria:
(ONE or MORE SYMPTOMS and ONE or MORE OBJECTIVE findings.)
One or more of the FOLLOWING SYMPTOMS affecting at least part of the median nerve distribution of the hand:
One or more of the FOLLOWING OBJECTIVE findings:
So in other words, you need at least one from the SYMPTOMS group, and at least one from the OBJECTIVE FINDINGS group in order to fall under this diagnostic criteria for carpal tunnel syndrome.
Although the latest diagnostic criteria for carpal tunnel was developed to better help define and track carpal tunnel syndrome from a governmental labor standpoint, the criteria is appropriate and helpful for clinical practice as well, whether work-related or not.