Table 3 Ratio and proportion values when the numerator or denominator value contains a zero
From: The use and misuse of ratio and proportion exposure measures in food environment research
|  | Number of unhealthy food stores (numerator) | Number of healthy food stores (ratio denominator) | Ratio (unhealthy: healthy) | Proportion (unhealthy: all food stores) |
|---|---|---|---|---|
Area 1 | 0 | 1 | 0 | 0 |
Area 2 | 0 | 3 | 0 | 0 |
Area 3 | 1 | 0 | Undefined | 1 |
Area 4 | 7 | 0 | Undefined | 1 |
Area 5 | 0 | 0 | Undefined | Undefined |