Assess whether there is a difference between the incidence rate of breast cancer for premenopausal vs. postmenopausal

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Assess whether there is a difference between the incidence rate of breast cancer for premenopausal vs. postmenopausal women, while controlling for age. Report a p-value?


Cancer

The data in Table 14.34 provide the relationship between breast-cancer incidence rate and menopausal status by age, based on Nurses€™ Health Study (NHS) data from 1976 to 1990.

Table 14.34 Relationship between breast-cancer incidence rate and menopausal status after controlling for age, NHS, 1976€“1990

 Premenopausal Postmenopausal Cases/person-years (incidence rato)



aPer 100,000 person-years.

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