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Table 1 Functional level and intensity of pain reported by patients undergoing surgical correction of medial subluxation of the patella (data from Hughston [5]).

From: Role of pathophysiology of patellofemoral instability in the treatment of spontaneous medial patellofemoral subluxation: a case report

Functional level Pain
External support required or sedentary activities None
Activities of daily living Mild
Light recreational Moderate
Moderate recreational Severe
Vigorous recreational Totally disabling
Highly competitive