Calculate separately for three weight groups the odds ratio

Assignment Help Basic Statistics

Reference no: EM13953136

Postmenopausal women who develop endometrial cancer are on the whole heavier than women who do not develop the disease. One possi- ble explanation is that heavy women are more exposed to endogenous estrogens which are produced in postmenopausal women by conversion of steroid precursors to active estrogens in peripheral fat. In the face of varying levels of endogenous estrogen production, one might ask whether the carcinogenic potential of exogenous estrogens would be the same in all women. A case-control study has been conducted to examine the relation among weight, replacement estrogen therapy, and endometrial cancer. The results are shown in Table E1.23.

Estrogen Replacement

Weight (kg)	Yes	No
57
Cases	20	12
Controls	61	183
57-75
Cases	37	45
Controls	113	378
>75
Cases	9	42
Controls	23	140

(a) Calculate separately for the three weight groups the odds ratio associated with estrogen replacement.

(b) Compare the three odds ratios in part (a). When the difference is confirmed properly, we have an effect modification.

(c) Assuming that the odds ratios for the three weight groups are equal (in other words, weight is not an effect modifier), calculate the Mantel-Haenszel estimate of this common odds ratio.

Reference no: EM13953136

Questions Cloud

Time value of money calculations : 1. A deposit of $7,000 is made on January 1, 2014. The deposit will earn interest at a rate of 8%. How much will be accumulated on January 1, 2019, assuming that interest is com- pounded (a) annually, (b) semiannually, and (c) quarterly?

Managers place a high priority on internal control : Managers place a high priority on internal control systems because the systems assist managers

Increase the tax revenue generated by an income tax : Increases in the tax rate on income will always increase the tax revenue generated by an income tax.[Hint: Think about the tax rate effects incentives for income generation.]

Problem regarding the present value and future value : Brian Inc. estimates that it will need $150,000 in ten years to expand its manufacturing facilities. A bank has agreed to pay Brian 5% interest compounded annually if the company deposits the entire amount now needed to accumulate $150,000 in ten ..

Calculate separately for three weight groups the odds ratio : Assuming that the odds ratios for the three weight groups are equal (in other words, weight is not an e¤ect modifier), calculate the Mantel-Haenszel estimate of this common odds ratio.

Improve the performance of her hotel : Paige Vincent is the RM at the City Center Novotel. For over 12 months, she hasbeen working hard to improve the performance of her hotel.

What are the independent and dependent variables : They have recorded the steady increase of the sales of these walking slippers every month. They want to figure out the upward trend in sales so they create a trend line and use linear analysis to use the slope of the line to predict sales in futur..

Shrinkage in the most recent year : The Home Depot experienced no shrinkage in the most recent year. Using both companies' balance sheet and income statement

Showing possible terms of trade for country : Given the following table showing possible terms of trade for country I and country I's corresponding demand for imports of good Y at each terms of trade:

User Account

All Pages