Answers
Question 11:- odds ratio for each category is as below
odds ratio = ad/bc
odds ratio= 8×785/68×622
= 0.15
odds ratio = 8×482/ 68×498
=0.11
odds ratio = 8×195/68×402
=0.06.
odds ratio= 8×1462/68×1522
=0.11
Question 12:-
Odds ratio for each category is as follows:-
| Number of cigarettes | Odds ratio |
|---|---|
| 1-14 | 0.15 |
| 15 - 24 | 0.11 |
| 25+ | 0.06 |
| All | 0.11 |
Results:- number of cigarettes smoked directly relates to the occurrence of lung cancer
Coe contos G8 2. 622 4 18 02 S-24 ts ,a 1,2 ,s30 s30 1,462 Total
Odds vaho hy catepoy of condumphon, compang each smo Cate n9 gooy to non-smokens f we tate Seatal lumbesuotse rouor g ta) 6&(b 1-14 622 ()rd ci
o ( non-Smo tuu) 3 et fad ) 498 (C)
on-smo ast
S. ,S2 1,96
.
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