Table 1.

Health utility changes in the studies using pCGS or other forms of glucosamine

	Type of glucosamine	N	Duration (month)	Health utility changes in the glucosamine group	Health utility changes in the Placebo group
Giordano et al. [17]	pCGS	60	3	0.135	− 0.0742
Beaumont et al. [16]	pCGS	210	6	0.0785	0.0315
Reginster et al. [14]	pCGS	212	36	0.1606	0.1427
Pavelka et al. [15]	pCGS	202	36	0.0487	0.0207
Houpt et al. [18]	Other form of glucosamine	101	2	0.0293	0.0129
McAlindon et al. [19]	Other form of glucosamine	205	3	− 0.0465	− 0.0339
Frestedt et al. [22]	Other form of glucosamine	35	3	0.1629	0.0613
Chopra et al. [25]	Other form of glucosamine	70	3	0.0016	0.1232
Cibere et al. [20]	Other form of glucosamine	137	6	0.0096	0.0006
Clegg et al. [21]	Other form of glucosamine	630	6	0.0242	0.0383