Table 2.

Results of critical appraisal for appraising descriptive studies

Citation	Q1Random allocation	Q2Clearly defined inclusion criteria	Q3 Confounding factors accounted for	Q4Objective assessment	Q5Description of compared groups	Q6Appropriate follow-up time	Q7Withdrawals accounted for	Q8Reliable outcome measures	Q9Appropriate statistical analysis	Total
Haghighat et al. 201375	N	Y	Y	?	N/A	N	?	Y	Y	3/7
Hwang et al. 201379	N	Y	Y	Y	Y	Y	N/A	Y	Y	6/8
%	0	100	100	50	100	50	0	100	100

? = unclear; N = no; N/A = not applicable; Y = yes.