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Biostatistics MCQ Bank Forum Hot - Unasnwered
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Quick Scroll zarda pan? 12.03.03 (4 years ago) #1
in case control study of buccal ca:
a.carcinoma is more common in zarda pan users than nonusers
b.zarda pan is a cause of buccal ca
c.zarda pan is assoc. with buccal ca
d.if use of zarda pan is stopped,number of cases will reduce
AIIMS DEC 97
well is it considered as a carcinogen or just an assoc factor for ca & if so what about option d?
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Quick Scroll intervene! 12.03.03 (4 years ago) #2
Quote:
in case control study of buccal ca


well,
if u talk about choice d,

to know,if stopping zarda/pan wud decrease the incidence of buccal carcinoma,we oughtta intervene or manipulate our study,by withdrawing the causative factor frm the study grp n studying the effect,therby! icon_eek.gif

n dat wud come under randomised control trials!to be precise under,cessation experiments! the very same way,it was studied dat stopping smoking wud decrease incidence of lung carcinoma.dat doesnt comes under case control study!icon_lol.gif

but wats the ans given!im confused abt rest of the choices! icon_sad.gif
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Quick Scroll 12.03.03 (4 years ago) #3
Can you prove causation with a case control study?
I have my doubts......... icon_arrow.gif

Via Odd's ratio we can only measure the strength of association. 8)
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Quick Scroll true! 12.04.03 (4 years ago) #4
true!we can measure only strength of association,in a case control study! icon_smile.gif

but then how can we chose between choice a and c?
both confirm assoc of zarda/pan with buccal carcinoma. icon_rolleyes.gif

or am i missing sum basics? icon_sad.gif
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Quick Scroll 10.24.05 (3 years ago) #5
???????
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Quick Scroll 10.24.05 (3 years ago) #6
i will go for A
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