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The normalized concentration indices for MH use for whole sample, and rural and urban areas in Iran
| Sample | n | The Cn | 95% Confidence interval |
|---|---|---|---|
| Urban | 20,313 | 0.1754 | 0.1408 to 0.2101 |
| Rural | 18,546 | 0.1191 | 0.0779 to 0.1603 |
| Total | 38,859 | 0.1519 | 0.1254 to 0.1784 |
Cn is the normalized relative concentration index
