A Double-Blind, Randomized Controlled 12-Week Follow-Up Trial to Evaluate the Efficacy and Safety of Polycan in Combination with Glucosamine for the Treatment of Knee Osteoarthritis

Table 1

Grading scales for the radiographic osteoarthritis classification system [20].

Grade	Characteristics
0	No joint space narrowing (JSN) or reactive changes
1	Doubtful JSN, possible osteophytic lipping
2	Definite osteophytes, possible JSN
3	Moderate osteophytes, definite JSN, some sclerosis, possible bone-end deformity
4	Large osteophytes, marked JSN, severe sclerosis, definite bone-end deformity