Table 2 The certainty of the evidence of ginseng for non-shivering thermogenesis

Study	Certainty assessment
	Certainty assessment	Inconsistency	Indirectness	Imprecision	Others	The certainty of the evidence
UCP1 mRNA (compared with negative control)	serious	serious	not serious	very serious	strong association	⊕○○○ Very low
UCP1 protein (compared with negative control)	very serious	not serious	not serious	not serious	very strong association	⊕⊕⊕⊕ High
PGC-1α mRNA (compared with negative control)	very serious	not serious	not serious	not serious	strong association	⊕⊕⊕○ Moderate