Boston Carpal Tunnel Questionnaire

It can be accomplished within five minutes.

Even if this is a self-reported health measurement scale, that doesn't mean they have to be the ones to tick their answers on the sheet. If it's apparent that they're dominant hand is the affected hand, you can conduct this assessment like an interview and have them tell you their answers while you tick each one for them.

No. It's a screening tool, but it can be used as part of the diagnostic process just in case the patient hasn't been diagnosed with carpal tunnel syndrome.