SANAA, Yemen — Women in Yemen are worse off now than a year ago, when they played a significant part in the country's revolution that promised political and economic change, an international aid agency has concluded.

In a report released Monday, Oxfam International said four out of five Yemeni women claim their lives have worsened over the past 12 months. Faced with an intensifying humanitarian crisis, which has left a quarter of women between the ages of 15 and 49 acutely malnourished, they say they're struggling to feed their families and are unable to participate in the country's transition.

"The food crisis is the biggest impediment," said Sultana Begum, an Oxfam humanitarian policy advisor who authored the report. "How do you expect people to participate in this very important process which is going to decide the future of a country . when they're focused on day-to-day survival?"