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Vinegar test lowers cervical cancer deaths

Usha Devi, right, who was suffering from cervical

Usha Devi, right, who was suffering from cervical cancer, talks with health workers from Tata Memorial Hospital in a slum in Mumbai, India. (May 21, 2013) Photo Credit: AP

MUMBAI, India -- A simple vinegar test slashed cervical cancer death rates by one-third in a remarkable study of 150,000 women in the slums of India, where the disease is the top cancer killer of women.

Doctors reported the results Sunday at a cancer conference in Chicago. Experts called the outcome "amazing" and said this quick, cheap test could save tens of thousands of lives each year in developing countries by spotting early signs of cancer, allowing treatment before it's too late.

Usha Devi, one of the women in the study, says it saved her life.

"Many women refused to get screened. Some of them died of cancer later," Devi said. "Now I feel everyone should get tested. I got my life back because of these tests."

Pap smears and tests for HPV, a virus that causes most cervical cancers, have slashed cases and deaths in the United States. But poor countries can't afford those screening tools.

This study tried a test that costs very little and can be done by local people with just two weeks of training and no fancy lab equipment. They swab the cervix with diluted vinegar, which can make abnormal cells briefly change color.

This low-tech visual exam cut the cervical cancer death rate by 31 percent, the study found. It could prevent 22,000 deaths in India and 72,600 worldwide each year, researchers estimate.

"That's amazing. That's remarkable. It's a very exciting result," said Dr. Ted Trimble of the National Cancer Institute in the United States, the main sponsor of the study.

The research effort was led by Dr. Surendra Shastri of Tata Memorial Hospital in Mumbai. India has nearly one-third of the world's cases of cervical cancer -- more than 140,000 each year.

Starting in 1998, researchers enrolled 75,360 women to be screened every two years with the vinegar test. Another 76,178 women were chosen for a control, or comparison, group that just got cancer education at the start of the study and vouchers for a free Pap test -- if they could get to the hospital to have one. Women in either group found to have cancer were offered free treatment at the hospital.

An ethics controversy developed during the study. The U.S. Office for Human Research Protections faulted researchers for not adequately informing participants in the comparison group about Pap tests for screening. A letter from the agency in March indicated officials seemed to accept many of the remedies study leaders had implemented.

Others defended the study.

"We looked at the ethics very carefully" and felt them to be sound, and visited the project in India, said Trimble of the National Cancer Institute.

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