A Retrospective Study of Patient Satisfaction Following a Trial of Nano-fractional RF Treatment.

Criteria (Maximum score)	Score
Randomization	0/2
Placebo	0/2
Blinding	0/2
Objective measurement	0/1
Sample size more than 21	1/1
Sample selection and allocation concealment	0/1
Economical	0/1
Conflict of interest	1/1
Withdrawal / Dropouts	0/1
	1/1
Co-Interventions	0/1
Acceptable theory	1/1
Total	4/15

Interpretation is as follows:
13-15	Excellent study with substantial evidence
10-12	Good study. Evidence sufficient for practice
7-9	Average Study. Use the evidence with caution
4-6	Weak Study. Evidence not suitable for practice
0-3	Just an anecdotal claim