Published: Dec 08, 2010 8:00 PM EST
Updated: Dec 08, 2010 5:00 PM EST

NEW YORK (AP) - McDonald's says a key sales figure rose 4.8 percent in November, helped in the U.S. by the popularity of the limited-time McRib sandwich.

The world's largest burger chain also says weaker foreign currencies will hurt its fourth-quarter earnings by a penny to 2 cents per share.

Sales in restaurants open at least 13 months rose 4.9 percent in the U.S. and Europe, 2.4 percent elsewhere. The figure is considered a key measure of a restaurant chain's health because it excludes stores that open and close during the period.

McDonald's McRib promotion ran nationally from Nov. 2 until last Sunday.

U.S. sales were also helped by sales of coffee drinks and value menu items.