Risk Estimate Value 95% Confidence Interval Lower Upper Odds Ratio for asbestos

Question

Risk Estimate

Value

95% Confidence Interval

Lower

Upper

Odds Ratio for asbestos (Yes / No)

26.455

13.622

51.376

For cohort lungca = Yes

7.462

4.569

12.185

For cohort lungca = No

.282

.209

.381

N of Valid Cases

280

What does the odds ratio value in the SPSS output tell you, specifically, about lung cancer and exposure to asbestos?

Answer: Based on the SPSS output, the odds ratio value indicates that there is relative risk of 7.462 that are at risk of lung cancer with exposure to asbestos, while the relative risk for not having lung cancer with exposure to asbestos is 0.282. Therefore there is a higher risk of having lung cancer with exposure to asbestos.   

Based on your answer above, would you say there is a strong association between asbestos exposure and lung cancer?

Answer:                                                                                                    

Risk Estimate

Value

95% Confidence Interval

Lower

Upper

Odds Ratio for asbestos (Yes / No)

26.455

13.622

51.376

For cohort lungca = Yes

7.462

4.569

12.185

For cohort lungca = No

.282

.209

.381

N of Valid Cases

280

Explanation / Answer

An Odds Ratio is a measure of association between an exposure (i.e. asbestos) and an outcome (i.e. lung cancer).

The Odds Ratio are used to determine whether a particular exposure is a risk factor for a particular outcome and to compare the magnitude of various risk factors for that outcome.

We will get following information from Odds ratio:

1. If odds ratio =1, then exposure does not affect odds of outcome

2. If odds ratio >1, then exposure associated with higher odds of outcome

3. If odds ratio <1, then exposure associated with lower odds of outcome

Also in above example,

The odds ratio value for having lung cancer with exposure to asbestos is 7.462. Therefore there is a risk of lung cancer with exposure to asbestos, while the relative risk for not having lung cancer with exposure to asbestos is 0.282. Therefore there is a higher risk of having lung cancer with exposure to asbestos.

Yes, there is a strong association between asbestos exposure and lung cancer on the basis of above answer.

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