Table 1.

Extracted data from analyzed studies.

Row	Authors	year of publication	Location	age	Sample size	Prevalence
1	Fallah (Fallah et al., 2022)	2021	Hamadan	–	688	12.5
12	Foladvand (Fouladvand et al., 2018)	2018	Bushehr	–	203	3.1
27	Najafi (Najafi et al., 2020)	2020	Tehran	2–6	399	22.1
2	Zami (Zamini et al., 2016)	2002	Marivan	1–6	338	41.1
3	Fani(Fani et al., 2003)	2002	Gonabad	0–6	328	15.8
4	Moghimi (Moghimi and Sharifi, 2002)	2002	Yasouj	–	300	9
5	Taherkhani (Taherkhani and Sardarian, 2005)	2005	Hamadan	8.1	776	20
6	Yaghoubi (Yaghoubi, 2016)	2016	Gilan	–	599	4.01
7	Moshfea (Moshfea and Sharifi, 2000)	2000	Yasouj	–	612	23.2
8	Hazrati Tapeh (Hazratitape et al., 2007)	2006	Urmia	1–6	393	4.5
9	Hazrati Tapeh (Hazrati Tapeh et al., 2003)	2002	Urmia	1–6	830	35.4
10	Abbasi Fard (Abbasi Fard et al., 2004)	2004	Zahedan	–	415	4.7
11	Abbasi Fard (Abbasi Fard et al., 2004)	2004	Zahedan	–	438	15.5
13	Daryani (Daryani et al., 2004)	2003	Ardabil	–	400	3.1
14	Mouszadeh (Moosazadeh et al., 2017)	2017	Iran	–	11,676	17.2
15	Atashnafas (Atash Nafas et al., 2007)	2007	Semnan	–	688	17.2
16	Abedi (Abedi et al., 2004)	2004	Isfahan	–	451	0.4
17	Rahimi (Rahimi et al., 2015)	2015	Shahroud	–	261	2.3
18	Sharif (Sharif and ziaie hezar garibi H., 2000)	2000	Sari	2–5	811	2.1
19	Mousaviani (Mosaviani and Sc, 2006)	2006	Tehran	1–6	217	29.5
20	Amiri (Amiri et al., 2016)	2016	Babol	–	351	26.4
21	Sharifi Maud (Sharifi Moud et al., 2000)	2000	Zahedan	–	126	22.2
22	Afrakhteh (Afrakhteh et al., 2016)	2016	Amol	–	384	31.8
23	Kalantari (Kalantari and Mobadi, 2000)	2000	Babol	–	462	7.1
24	Azad (Soheili Azad et al., 2005)	2005	Tehran (Rabat karim)	–	368	33.6
25	Baghai (Baghaei et al., 2001)	2001	Isfahan (Mobarake)	under 12 years old	555	9.3
26	Taheri (Taheri et al., 2004)	2003	Birhand	6	650	16.1
28	Kosha (Koosha, 2006)	2006	Tehran	–	154	9
29	Nowrozi (Norouzi et al., 2016)	2016	Zanjan	–	1548	2.7
30	Shahabi (Shahabi, 2000)	2000	Tehran (Shahriar)	–	854	1.5
31	Rafiei (Rafiei et al., 2000)	2000	Tehran (Shahre ray)	–	1902	3
32	Mohammadzadeh (Mohammedzadeh et al., 1990)	1990	Tehran	–	1155	0.08
33	Mohammadzadeh (Mohammedzadeh et al., 1990)	1990	Tehran	–	254	0.4
34	Mohammadzadeh (Mohammedzadeh et al., 1990)	1990	Tehran	–	1060	0.85
35	Mohammadzadeh (Mohammedzadeh et al., 1990)	1990	Tehran	–	399	648
36	Ali Talari (Talari et al., 1998)	1997	Kashan	–	859	35.7
37	Ali Talari (Talari et al., 1998)	1997	Kashan	–	362	20.7
38	Eslami Rad (Eslami Rad et al., 1999)	1999	Arak	–	394	1.5
39	Hazrati tapeh (Hazrati Tappeh et al., 2010)	2015	Urmia	–	405	10.6
40	Ghahramanloo (Ghahramanlou et al., 2001)	2001	Babol	–	3429	0.7
41	Sharifi (Sharifi Sarasiabi et al., 2001)	2001	Bandar Abbas	–	1369	1.5
42	Badparva (Badparva et al., 2009)	2009	Lorestan	–	598	33.8
43	Farajzadeh (Farajzadeh and Foroughameri, 2003)	2003	Birjand	1–6	355	14.9
44	Ahmad Rajabi (Ahmad-Rajab et al., 2003)	2003	Bam	<7	370	15.9
45	Haji Alyani (Haji Aliani et al., 2014)	2014	Karaj	1–6	904	1.8
46	Khademi (Khademi and Arman, 2009)	2010	BandarAbbas	<8	534	0.9
47	Dawami (Davami et al., 2008)	2008	Jahrom	7–15	410	0.4
48	Mohammadvand (Mahmoudvand et al., 2020)	2005	Lorestan	2–15	366	6.8
49	Bahadori (Ranjbar-Bahadori et al., 2005)	2005	GhaemShahr	<9	2145	3.9
50	Torki (Turki et al., 2017)	2017	BandarAbbas	–	1465	0.1
51	Daryani (Daryani et al., 2012)	2021	Sari	7–14	1100	2.2