Table 1.

Coding sheet for critical appraisal.

Quality components	Yes/No (1/0)	Factors of the quality
Background and aim		a thorough research of related literature has been done and described well in the background of the study
		illustrated significance of the study has been mentioned
		clear aim of the study has been included
Design		number of the groups in the study
		blinding of the study
		baseline for the targeted measurement has been developed
		sample size was appropriate to answer the question of the study
Subjects		recruitment of subjects was illustrated clearly and following a strategy that is appropriate for the design
		the inclusion and exclusion criteria of the subjects stated clearly
		Adherence of the patients to the suggested protocol
		withdrawal percentage of subjects from the sample size before statistical analysis does not affect the statistical analysis of the study
		groups in the study were from similar environments
Intervention		treatment protocol was described clearly
		treatment is equal for all subjects
		treatment efficacy was measured precisely
Outcome		the outcome of the study was illustrated clearly
		supported for clinical importance with validity and reliability
		follow up period to measure the persistence of the effects after the intervention
Analysis		statistical analysis is well illustrated and suitable to measure the efficiency of the treatment
		the statistical analysis has been supported by mention of the significance of the intervention (p-value)
The study is replicable		The study is replicable by other researchers because of availability of the previous factors
Recommendation and conclusion		Recommendation and conclusion of the study were stated clearly and related to the results of the study