NEW YORK — Shoppers grappling with rising layoffs and shrinking retirement accounts dug deep into survival mode last month, leading to sharp January sales declines for many retailers.

The poor results raised more concerns about the financial health of the industry. The malaise crossed the spectrum of retailing, from department stores to teen chains. Gap, luxury retailer Saks and Children's Place were among those posting deeper-than-expected sales declines. Wal-Mart, the world's largest retailer, was a notable exception.