Table S2.

Incidence of adverse events^a

Variables	GCQID group	Placebo group	P-value
Number of subjects eligible for safety assessment	50	50
Number of subjects with adverse events	10	10	1.000
Incidence of adverse eventsa (%)	20	20	1.000
Number of adverse events	14	14	1.000

Note:

^aIncidence of adverse events (%) =100× number of subjects with adverse events/number of subjects eligible for safety assessment.

Abbreviation: GCQID, glucosamine hydrochloride, chondroitin sulfate, quercetin glycosides, imidazole peptides, and vitamin D.