Table 3.
The incidence rates of studies in descending order
| Study | Location | Area | Incidence rate | 95% CI | |
|---|---|---|---|---|---|
| 1 |
Sadeghi, A. 2003 |
West Azarbayjan | North-West | 146.83 | 142.20, 151.46 |
| 2 |
Behnampour, N. 2011 |
Aq-Qala | North-East | 118.45 | 116.42, 120.47 |
| 3 |
Dadypour, M. 2009 |
Kalaleh | North-East | 22.91 | 22.16, 23.67 |
| 4 |
Alavinia, SM. 2015 |
North Khorasan | North-East | 22.12 | 21.799, 22.436 |
| 5 |
Ghafouri, M. 2015 |
Bojnourd | North-East | 16.92 | 16.487, 17.350 |
| 6 |
Kassiri, H. 2014 |
Islam-Abad Gharb | West | 16.72 | 16.11, 17.33 |
| 7 |
Dehghani, R. 2013 |
Semirom | Center | 16.47 | 15.559, 17.388 |
| 8 |
Kassiri, H. 2014 |
Shush | South-West | 11.80 | 11.31, 12.28 |
| 9 |
Rezaeinasab, M. 2007 |
Kerman Province | South | 9.95 | 9.81, 10.08 |
| 10 |
Alavi, S. M. 2008 |
Khuzestan | South-West | 9.84 | 9.75, 9.93 |
| 11 |
Naghibi, S.A. 2014 |
Mazandaran | North | 8.81 | 8.71, 8.92 |
| 12 |
Sabouri Ghannad, M. 2014 |
Borujerd | West | 8.68 | 8.36, 9.00 |
| 13 |
Rafiei, N. 2014 |
Aq-Qala | North | 8.58 | 8.06, 9.11 |
| 14 |
Sabouri Ghannad, M. 2012 |
Ilam Province | West | 7.96 | 7.72, 8.19 |
| 15 |
Najafi, N. 2009 |
Mazandaran | North | 7.72 | 7.62, 7.82 |
| 16 |
Riyahi, S.M. 2012 |
Tabas | East | 6.96 | 6.34, 7.58 |
| 17 |
Feizhaddad, M.A. 2014 |
Shush | South-West | 6.82 | 6.45,7.19 |
| 18 |
Saghafipour, A. 2014 |
Qom Province | North-West | 6.53 | 6.38, 6.68 |
| 19 |
Sheikholeslami, N. Z. 2009 |
Rafsanjan | South | 6.17 | 5.86, 6.48 |
| 20 |
Bijari, B. 2011 |
Birjand | East | 6.16 | 5.86, 6.45 |
| 21 |
Taghvaii, M. R. E. 2013 |
Mashhad | North-East | 4.83 | 4.75, 4.91 |
| 22 |
Bahonar, A.R. 2008 |
Ilam Province | West | 4.76 | 4.58, 4.96 |
| 23 |
Babaeeian-Moghaddam, M. 2015 |
Ghouchan | North-East | 4.53 | 4.22, 4.84 |
| 24 |
Khazaei, S. 2014 |
Tuyserkan | North-West | 4.09 | 3.71, 4.48 |
| 25 |
Majidpour, A. 2004 |
Ardebil Province | North-West | 3.64 | 3.53, 3.74 |
| 26 |
Kassiri, H. 2014 |
Ahvaz | South-West | 3.23 | 3.13, 3.33 |
| 27 |
Ranjbar, H. M. 2006 |
Torbat Heydariyeh | North-East | 2.88 | 2.70, 3.06 |
| 28 |
Havasian, M.R. 2015 |
Ilam | West | 2.80 | 2.58, 3.02 |
| 29 |
Amiri, M. 2009 |
Shahroud | North-East | 2.43 | 2.24, 2.63 |
| 30 |
Kassiri, H. 2012 |
Ahvaz | South-West | 1.88 | 1.80, 1.95 |
| 31 |
Eslamifar, A. 2008 |
Tehran | North-West | 1.16 | 1.14, 1.19 |
| 32 |
Zohrevandi, B. 2014 |
Rasht | North-West | 1.10 | 1.04, 1.17 |
| 33 |
Mohtasham-Amiri, Z. 2015 |
Gilan | North-West | 0.71 | 0.68, 0.75 |
| 34 |
Vahdati, S. 2013 |
Tabriz | North-West | 0.65 | 0.62, 0.69 |