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2 × 2 table for example 1
| Death from CHD | ||||
| yes | no | ∑ | ||
| Exposure | smoker | 69 | 10263 | 10332 |
| non-smoker | 100 | 24008 | 24108 | |
| ∑ | 169 | 34271 | 34440 | |
The absolute numbers in this table are calculated using the sample size of the study (34440), the annual CHD death rates for smokers (π1 = 0.669%) and non-smokers (π0 = 0.413%), and a hypothetical prevalence of smoking of 30% in the study population.
