Cable networks supported by advertising revenue saw their prime-time audiences increase 11.2% to 27.4 million households last year, according to the Cabletelevision Bureau of Advertising.

In the same period, said the CAB (using Nielsen Media Research figures), the seven broadcast networks saw their aggregated audience for prime-time slip 6.8% to 29m homes.

The cable sector was boosted by high ratings for CNN, MSNBC and Fox News Channel in the wake of September 11.

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