Musuq
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A case-control study is conducted to determine if women who delay childbearing are at increased risk for having children with low birth weight. A group of women who were at least 35 years old during their first pregnancy are compared with a group of women who were between the ages of 20 and 24 years during their first pregnancy. The following data are obtained:
What is the odds ratio for an older woman (relative to that of a younger woman) to have an infant with a low birth weight?
A. (21 / 425) / (54 / 799) = 0.73
B. (54 / 799) / (21 / 425) = 1.37
C. (54 / 745) / (21 / 404) = 1.39
D. (54 / 799) x 100 = 6.8
E. (54 / 75) / (745 / 1149) = 11.1
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| smal
Forum Guru
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B.
odds of having LBW baby in high age group/odds of having LBW baby in N age group
i.e.(54/799)/(21/425)
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| suravi
Forum Newbie
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Is not the answer C. smal - Can u please explain how u got it?
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| smal
Forum Guru
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ya am sorry.
odds of having disease will be no. with disease/no. without disease.
u r rt suravi.
thanks
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remedy for weakness is not brooding over it ,but thinking of strength.
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| robin082006
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C
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| Addicudo
Forum Guru
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Umm ... A bit confused here.. Wasnt the Odds Ratio .. A X D / B X C
A here being the >34 and the corresponding LBW box .. i.e the 54 Bos ... and acc to kaplan .. D is always the box diagonal to the A box ..
Thus making it .. 54 X 404 .. And thus givin me an answer that NOT EVEN in the option list ...  .. something is wrong ..
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| jamdoc
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i agree with u addicudo,when u caluclate using AD/BC the choice shld b 54X404/745X21
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| dreamer
Forum Elite
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C
AD/BC ( 54/ 745) / (21 / 404)=54X404/745X21
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| Addicudo
Forum Guru
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 ... Omy my ... Its the same thing ... C is the answer .. 54X404/745X21
is the same as ( 54/ 745) / (21 / 404) !! Frames of MIND .. !!! .. !!
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| dncosta
Licensed, finally
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C
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