Table 3. Quality assessment of individual studies based on critical and less critical criteria.

First author,year of publication	Critical criterion (%)	Less critical criterion (%)	Quality assessment individual study
Onyirimba, 2003 [25]	38	63	Low
Schmitz, 2005 [26]	63	47	Low
De Geest, 2006 [27]	50	67	Low
Mooney, 2007 [28]	50	27	Low
Santschi, 2008 [29]	75	67	High
Sabin, 2010 [30]	88	73	High
Forni Ogna, 2013 [33]	63	60	Low
De Bruin, 2010 [31]	88	63	High
Brath, 2013 [32]	25	31	Low
Dobbels, 2017 [34]	100	63	High