71. The author of the passage is mainly concerned with ____.

1. statistics of breast cancer incidence
2. diagnosis and treatment of breast cancer
3. reasons for breast cancer deaths
4. breast cancer and its risk factors

72. The author implies that there were fewer cases of breast cancer in the past ____.

1. because they were not detected with mammography screening in asymptomatic women
2. because many women did not have as many children as they do now
3. because they were smaller than they are now
4. because breast cancer was not common in childbearing women

73. The incidence of breast cancer has increased while mortality has decreased owing to ____.

1. reduced risk factors
2. changed reproductive patterns
3. regular mammography screening and improvements in breast cancer treatment
4. the annual increase in age-adjusted ductal carcinoma in situ incidence rate

74. Risk factors of breast cancer do NOT include which of the following?

1. The most common malignancy diagnosed in the United States.
2. Delayed childbearing and having fewer children.
3. Alcohol consumption and use of postmenopausal hormones.
4. A family history of breast cancer.

75. According to the passage, women with a family history of breast cancer ____.

1. may not necessarily have an inherited breast cancer syndrome
2. do not have any striking history of breast cancer
3. have an increased risk of breast cancer
4. usually have a family history of sporadic breast cancer

(Reference keys.)