Table 1.

Diagnostic criteria for the knee.¹

PRESENCE OF KNEE PAIN PLUS AT LEAST THREE OF THE FOLLOWING
a. Morning stiffness for less than 30 minutes
b. Crepitus on active knee motion
c. Older than 50 years of age
d. Bony enlargement
e. No palpable warmth
f. Bony tenderness

Notes: Studies have shown that there is improved sensitivity and specificity when the criteria shown in Table 1 are combined with laboratory or radiologic findings of osteophytes. This was validated with arthroscopic examination of the knee.³¹