Calculation of the index of dissimilarity
| Frequency of disease (per 1000 people)* | Number of people | Number of cases observed | Population share (1) | Cases share (2) | Absolute differences (1–2) |
|---|---|---|---|---|---|
| *Frequencies of disease in each socioeconomic category. The index of dissimilarity is the same regardless of the socioeconomic category to which these values belong. | |||||
| 7.50 | 8000 | 60 | 0.08 | 0.04 | 0.04 |
| 9.00 | 15000 | 135 | 0.15 | 0.09 | 0.06 |
| 12.00 | 20000 | 240 | 0.20 | 0.17 | 0.03 |
| 13.50 | 35000 | 473 | 0.35 | 0.33 | 0.02 |
| 24.75 | 22000 | 545 | 0.22 | 0.38 | 0.16 |
| 100000 | 1452 | 0.31 | |||
| Index of dissimilarity = 0.31/2 = 0.155 (or 15%) | |||||