Jay Leno's Ratings Shrink From Conan O'Brien's in 18-49 Demo

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O'Brien drew 4.4% more coveted younger viewers in his brief stint as "Tonight Show" host.

Jay Leno's ratings among young viewers have shrunk in the seven months since he's returned to hosting The Tonight Show, the Wall Street Journal reports.

Just 1.3 million of his 3.7 nightly viewers are between 18 and 49, down 4.4% from Conan O'Brien's short-lived stint as host.

The paper expects O'Brien to continue to draw more younger viewers when his TBS show, "Conan," premieres this November, although the two won't directly compete against each other. (Conan airs at 11 p.m., 35 minutes after Leno.)

This is the latest ratings woe for Leno.

Last week, David Letterman tied Leno for the first time ever in the 18-49 demo, with a .09.

Among total viewers, Jay earned 3.5 million viewers and Dave had 3.4 million.