The formula for the Mantel-Haenzsel estimator to get an adjusted IDR is: ? [ai(P

Question

The formula for the Mantel-Haenzsel estimator to get an adjusted IDR is: ? [ai(PY2i)/(PY1i)] ? [bi(PY1i)/(PY2i)] In this example, if Table 1 is for males and Table 2 is for females what is PY21 ?

A. Person-years for males who had a non-CVD death

B. Person-years for females who are still alive

C. Person-years for males who did not have to nap

D. Person-years for females who did not have to nap

Cause of Number Death Person-Years of follow-u Gender Have to Nap Persons MaleYes Total 2180 6540 on- 51 23 Dead CVD Dead CVD Total Dead CVD No 15040 on- 129 Dead CVD Total Dead CVD 47 5232 32 Females Yes 15646 on- Dead CVD Total Dead CVD No 3401 9400 Non- 80 41 Dead CVD

Explanation / Answer

A. 51+23=74

B. 5232+15646-(32+22)=20824

C. 129+47=176.

D. 80+41=121

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