Table 1.

Evaluation of quality of quantitative studies using STROBE tool (N = 13).

Row	Author(s) and year of publication	Introduction		Methods							Results							Discussion and conclusion					Score
		Title and abstract	Introduction	Study method	Performing environment	Contributors	Variables	Data source and measurement method	Bias	Sample size	Quantitative variables	Statistical analysis methods	Descriptive data	Participants' reports	Report the original data	Main results of the study	Other analyzes	Report key results	Limitations	Interpretation of results	Generalization	Budget and financial support
1	Vakilian et al., 2012 [23]	+	+	+	+	+	+	+ +	−	−	+ +	+	+	+	+	+	−	+	+	+	−	−	Medium
2	Alavi et al., 2010 [24]	+	+	+	+	+	+	+ +	−	−	+ +	+	+	+ +	+ +	+	−	+	−	+ +	−	−	High
3	Seraji and Vakilian, 2011 [25]	+	+	+	+	+	+	+ +	−	+	+ +	+	+	+	+	+	+	+	+	+ +	−	−	High
4	Leghaei and Hosseini, 2018 [26]	+	+	+	+	+ +	+ +	+ +	−	+	+ +	+	+	+ +	+	+ +	+	+	+	+ +	−	−	High
5	Hosseini et al., 2016 [27]	+	+	+	+	+	+	+ +	−	+	+ +	+	+	+ +	+	+	+	+	+	+ +	−	−	High
6	Nikbakht et al., 2014 [28]	+	+	+	+	+	+	+ +	−	+	+ +	+	+	+	+	+	+	+	+	+ +	−	−	High
7	Nehbandanii et al., 2018 [29]	+	+	+	+	+	+	+ +	−	+	+ +	+	+	+	+	+	+	+	+	+ +	−	−	High
8	Sobhani et al., 2006 [30]	+	+	+	+	+	+	+ +	−	+	+	+	+	+	+	+	+	+	+	+	−	−	Medium
9	Khani et al., 2013 [31]	+	+	+	+	+	+	+	−	+	+	+	+	+	+	+	+	+	+	+	−	−	Medium
10	Houshyar et al., 2015 [32]	+	+	+	+	+	+	+ +	−	+	+	+	+	+	+	+	+	+	+	+	−	−	Medium
11	Hadi and Hanid, 2011 [33]	+	+	+	+	+	+	+	−	+	+	+	+	+	+	+	+	+	+	+	−	−	Medium
12	Yazdkhasti and Pirak, 2016 [34]	+	+	+	+	+	+	+	−	+	+	+	+	+	+	+	+	+	+	+	−	−	Medium
13	Olapour et al., 2013 [35]	+	+	+	+	+	+	+	−	−	+	+	+	+	+	+	+	+	+	+	−	−	Medium