Table 1: Characteristics and References of Excluded Studies

Study	Treatment	Reason for Exclusion
Fardellone P; 2009 [16]	Chondroitin sulfate (Structum®) vs Chondroitin sulfate (Chondrosulf®)	not vs placebo
Nasonova et al.; 2001 [17]	Chondroitin sulfate (Structum®) + NSAID vs NSAID	open design, not vs placebo
Alekseeva et al.; 1999 [18]	Chondroitin sulfate (Structum®) + Ibuprofen vs Ibuprofen	open design, not vs placebo
Soroka NF, Chyzh KA; 2002 [19]	Chondroitin sulfate (Structum®) + NSAID vs NSAID	open design, not vs placebo
Mazières et al.; 1992 [20]	Chondroitin sulfate (Structum®) 2g/day vs placebo	inadequate dose