•Child poverty declined from 22.3 percent to 18 percent under the new measure. Under both measures, children still remained the age group most likely to be living in poverty.
•By race, Hispanics and Asians saw higher rates of poverty — 27.8 percent and 16.7 percent, respectively — compared with rates of 25.8 percent and 11.8 percent under the official formula. In contrast, African-Americans saw a modest decrease, from 27.3 percent to 25.8 percent based on the revised numbers. Among non-Hispanic whites, poverty rose from 9.8 percent to 10.7 percent.
The number of poor people in America is 3 million more than the official count, encompassing 1 in 6 residents due to out-of-pocket medical costs and work-related expenses, according to a revised census measure released Wednesday.
The new measure is aimed at providing a fuller picture of poverty, but does not replace the official government numbers. Put in place two years ago by the Obama administration, it generally is considered more reliable by social scientists because it factors in living expenses as well as the effects of government aid, such as food stamps and tax credits.
Administration officials have declined to say whether the new measure eventually could replace the official poverty formula, which is used to allocate federal dollars to states and localities, and to determine eligibility for safety-net programs such as Medicaid.
Congress would have to agree to adopt the new measure, which generally would result in a higher poverty rate from year to year and thus higher government payouts for aid programs.
Based on the revised formula, the number of poor people in 2012 was 49.7 million, or 16 percent. That exceeds the record 46.5 million, or 15 percent, that was officially reported in September.
The latest numbers come as more working-age adults picked up low-wage jobs in the slowly improving economy but still struggled to pay living expenses. Americans 65 and older had the largest increases in poverty under the revised formula, from 9.1 percent to 14.8 percent, because of medical expenses such as Medicare premiums, deductibles and other costs not accounted for in the official rate.
There also were increases for Hispanics and Asian-Americans, partly due to lower participation among immigrants and non-English speakers in government aid programs such as housing aid and food stamps.
African-Americans and children, helped by government benefits, had declines in poverty compared with the official rate.
“This is a real incongruity, when 1 in 6 people face economic insecurity here in the richest country in the world,” said Joseph Stiglitz, a Columbia University economist and former chairman of the White House Council of Economic Advisers who has argued for more government action to alleviate income inequality.
“When so many citizens are worse off year after year, with food insecurity and health care insecurity, there’s no way you can say that’s a successful economy.”
Last week, more than 47 million Americans who receive food stamps saw their benefits go down, while Congress began negotiations on further cuts to the program of up to $4 billion annually.
Among states, California had the highest share of poor people, hurt in part by high housing costs and large numbers of immigrants, followed by the District of Columbia, Nevada and Florida. Under the official poverty rate, more rural states were more likely to be at the top of list, led by Mississippi, Louisiana and New Mexico.
“The primary reason that poverty remains so high is that the benefits of a growing economy are no longer being shared by all workers as they were in the quarter-century following the end of World War II,” said Sheldon Danziger, a University of Michigan economist.
“Given current economic conditions, poverty will not be substantially reduced unless government does more to help the working poor.”
Economists long have criticized the official poverty rate as inadequate. Based on a half-century-old government formula, the official rate continues to assume the average family spends one-third of its income on food. Those costs have declined to a much smaller share, more like one-seventh.