Table 2.

Characteristics of the included studies

No	Author	Year	Place	Total sample	Prevalence (%)	Tool	Causes	Hospital type	Ward	Quality article	Reference
1	Malekzadeh	2014	Mazandaran	1927	24.02	Error report form	Incorrect Drug	Educational	All*	18	[22]
2	Mohammad Alizadeh	2014	Tehran	162	97.53	Error report form	Wrong patient	Educational	All	15	[23]
3	Zaree	2015	Tehran	379	54.08	Questionnaire	Wrong dosage	Public	All	21	[24]
4	Shams	2011	Khoy	350	28.9	Questionnaire	Concomitant administration of oral drugs with potential interaction	Public& private&Educational	All	18	[25]
5	Khammarnia	2012	Shiraz	2951	17.2	Medical error records	Wrong dosage	Public	All	20	[26]
6	Masrour	2012	Tehran	200	38.5	Questionnaire	Drug omission	Educational	All	19	[27]
7	Mirzaei	2012	Kermanshah	96	79.2	Questionnaire	Incorrect Drug	Educational	All	22	[18]
8	Hashemian	2019	Hamadan	903	42.6	Error report form	Wrong dosage	Educational	All	16	[28]
9	Baghaei	2015	Urmia	84	42.9	Questionnaire	Forgetting to give medication	Educational	All	18	[29]
10	Fathi	2016	Kermanshah	500	17	Questionnaire	Incorrect time	Educational	All	19	[30]
11	Yousefi	2019	Kashan	6020	9.45	Questionnaire	Incorrect time	Public	All	22	[31]
12	Joolaee	2009	Tehran	286	19.5	Questionnaire	Incorrect time	Educational	All	18	[32]
13	Fahimi	2009	Tehran	558	29.9	Direct obsevarion	Drug omission	Educational	All	20	[33]
14	Davoodi	2013	Mashhad	1000	46	Questionnaire	Incorrect Drug	Educational	All	20	[34]
15	Zahmatkeshan	2006	Bushehr	400	49.7	Questionnaire	Wrong dosage	Educational	All	20	[35]
16	Penjvini	2006	Sanandaj	104	16.7	Questionnaire	Wrong dosage	Educational	All	18	[36]
17	Ahangarzadeh	2010	Sanandaj	100	100	Questionnaire	Wrong patient	Educational	All	20	[37]

*Inpatient, Surgery,and Special wards and clinical departments