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Comparison of prevalence of nasal septum deviation in different races (%)
| Type of NSD | Europe[6] | Warsaw[23] | Zagreb[24] | Korea[25] | Szczecin[22] | Tehran (Iran) |
|---|---|---|---|---|---|---|
| Type 1 | 16.2 | 9.66 | 14.7 | 11.36 | 10.3 | 19.4 |
| Type 2 | 16.4 | 1.61 | 6.8 | 4.90 | 4.2 | 6.2 |
| Type 3 | 20.4 | 8.28 | 1.4 | 1.62 | 12.4 | 20.7 |
| Type 4 | 8.7 | 2.99 | 0.2 | 1.82 | 3.15 | 5.4 |
| Type 5 | 14 | 11.95 | 2.9 | 1.57 | 9.2 | 4.4 |
| Type 6 | 9.4 | 1.61 | 2.6 | 0.73 | 1.3 | 0.3 |
| Type 7 | 4.1 | 3.22 | 0.2 | 1.18 | 2.7 | 30.3 |
NSD: Nasal septum deviation
