Calculate mantel-haenszel estimate of this common odds ratio

Reference no: EM13953113

Data taken from a study to investigate the effects of smoking on cervical cancer are stratified by the number of sexual partners (Table E1.9).

TABLE E1.9
			Cancer
Number of Partners	Smoking	Yes		No
Zero or one	Yes	12		21
	No	25		118
Two or more	Yes	96		142
	No	92		150

(a) Calculate the odds ratio associated with smoking separately for the two groups, those with zero or one partner and those with two or more partners.

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

(c) Assuming that the odds ratios for the two groups, those with zero or one partner and those with two or more partners, are equal (in other words, the number of partners is not an effect modifier), calculate the Mantel-Haenszel estimate of this common odds ratio.

Reference no: EM13953113

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