View Full Version : ROCs for CTS early detection methods

David Sonntag
05-13-1993, 09:07 AM
I am the lead industrial hygienist for the Aircraft Maintenance
Directorate at the the Ogden Air Logistics Center, which performs
depot level maintenance of the F-16, F-4 and C-130 aircraft.
Our director of maintenance has proposed purchasing an automated
tactile tester to test threshold values for 50 Hz vibration.
He is proposing its use as an early detection of carpal
tunnel syndrome.

The local physiologist who markets it says that it detects
71% of clinically diagnosed pts w/ carpal tunnel syndrome,
compared to 44% detection by nerve conduction velocity.

Our hospital commander and military public health officer
would like to see more in terms of specificities and
sensitivities of the method. Our MPH officer also believes
that a questionnaire looking for tendonitis and tenosynovitis
would be a more sensitive tool to use as an early detector
of CTS.

I would like to construct receiver operating characteristic
(ROC) charts for both the automated tester and any other
methods that may be in use. This will help us in determining
the most suitable tool to use for early detection of CTS, which
is VERY prevalent in our workforce (about 16,000, the largest
employer in the state of Utah).

I'd appreciate anybody who can provide me with references from
the literature or their own experience that can help me with
the specificities and sensitivities that I need to construct
the comparison.



| David M. Sonntag, Capt, USAF, BSC |
| Bioenvironmental Engineer, MSPH |
| USAF Hospital Hill/SGB Hill AFB, UT 84056 |
| (801) 777-9844 FAX 777-5655 |
| DSN 458-9844 DSN 458-5655 |