Breast cancer more deadly to blacks

 　　BEIJING, July 26 (Xinhuanet) -- The breast cancer is more deadly to black women than to whites, a new study found.

　　This finding was published online Monday on the "Journal of Clinical Oncology" in the United States.

　　The study was done by the City of Hope, a Comprehensive Cancer Center in Duarte, California.

　　The researchers collected data from more than 4,500 U.S. women in the 35-64 age group who were diagnosed with breast cancer.

　　With the passing of  more than eight years, the researchers found the black women have a three times death rate than white women, after taking obesity¹ and other diseases into account.

　　"It’s been long known that breast cancer in African-American women is a far less common disease than in white women. But when it occurs, it seems to be more aggressive and harder to treat," said Dr. Lisa Carey of the University of North Carolina’s Lineberger Comprehensive Cancer Center.

　　But why the situations varied² by race, scientists are still exploring the answer.

1 obesity   

n.肥胖，肥大

参考例句：

• One effect of overeating may be obesity.吃得过多能导致肥胖。
• Sugar and fat can more easily lead to obesity than some other foods.糖和脂肪比其他食物更容易导致肥胖。

2 varied   

adj.多样的，多变化的

参考例句：

• The forms of art are many and varied.艺术的形式是多种多样的。
• The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。