Here's some of the breakdown of the stats Flor:

Gallup looked first at categories including anger, worry, stress, depression, smiling and laughter. It found that non-working women with a child under 18 at home experienced more worry, sadness, stress and anger than moms who are employed full-time or part-time.

One of the most noticeable differences revolved around questions about depression. Gallup asked the women polled if they’d ever been diagnosed with depression and found that SAHMs were more likely to say yes than working moms. Of SAHMs, 28% reported receiving a diagnosis of depression at some point compared with 17% each for employed moms and employed childless women. “Moms who are employed, full-time or part-time, look more like the employed women group than SAHMs,” says Mendes.

So does the data suggest that employment is the key to happiness? Well, it’s true that employed moms experience fewer negative emotions than SAHMs, according to Gallup’s survey. “It’s certainly possible that it’s because they are working,” says Mendes.

Gallup also compared different income groups, splitting women into high-income, middle-income and low-income categories to explore whether finances played a role in mothers’ reported well-being. Across all three income groups, SAHMs did worse on measures of sadness, anger and depression than employed moms.

When Gallup looked at other measures of well-being — such as happiness, enjoyment, learning something interesting and stress — there were no significant differences between working moms and SAHMs in the middle- and high-income groups. But differences remained in the lower income groups. “In general, we know that a very high percentage of Americans report happiness,” says Mendes. “So it might be endemic.”

Says Mendes: “This suggests there might be something about working that is creating more positive emotions for employed moms, or there might be something about staying at home that’s creating more negative emotions,” says Mendes.

Read more: http://healthland.time.com/2012/06/01/stay-at-home-moms-report-more-sadn...