Confounding Visual Exercise 3 -- Low-birth Weight
Does drinking coffee have an effect on low-birth weight?
| Cases | Controls |
|---|---|
|
|
2×2 Table
| Cases | Controls | |
|---|---|---|
| Smokers | 25 | 10 |
| Non-Smokers | 5 | 20 |
Odds Ratio = 10.0
There is a strong effect of smoking on low birth weight.
