LOS ANGELES, United States — American Apparel Inc. said Thursday that revenue in stores open at least a year, a key measure for retailers, rose 8 percent in July.

Sales in stores grew 6 percent, while online sales, which are also included in the metric, increased 23 percent. Revenue from stores open at least a year strips away the impact of recently opened or closed sites.

Total revenue rose 5 percent to $57.6 million. Revenue from its wholesale business, which sells clothing to other distributors and screen printers, rose 2 percent.

American Apparel, based in Los Angeles, operates 247 stores in 20 countries.

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