145;Something just doesn146;t add up146;

But if Landis had been a user, earlier urine tests during the Tour would have been affected, too, Wadler said. Landis8217; first reported abnormal result was last Thursday, after his come-from-behind performance in stage 17 of the race. One-time use of steroids could result in an abnormal test, but it would have no effect on performance and could not account for Landis8217; astounding feat Thursday, 8220;so something8217;s missing here,8221; Wadler said. 8220;It just doesn8217;t add up.8221;

The test detects both testosterone and a related steroid called epitestosterone, which is not performance-enhancing. Both are produced by the body and are also made in synthetic form. The usual ratio for both substances is about 1:1 or 2:1, Wadler said.

Suspicions for improper steroid use arise when the ratio climbs above 4 parts testosterone over 1 part epitestosterone, Wadler said. Officials have not said what ratio Landis8217; test showed.

Landis said in an interview during the Tour that he had injections of cortisone to treat pain from a degenerating arthritic hip.