Table 5. Clinical examination (apicititis test) and sonographical findings in the operated knee versus contralateral knee. N = 32 (64 knees). Two patients operated in both knees were excluded. Operated knee (N = 32) Contralateral knee (N=32) p≤ Mean SD Mean SD Proximal thickness longitudinal, cm .51 .15 .43 .14 .001 Proximal thickness transverse, cm .59 .17 .45 .21 .001 N % N % Edema Positive 20 62 7 22 .006 Negative 12 38 25 78 Hyperechoic changes Positive 10 31 3 10 1.00 Negative 22 69 29 90 Colour flow imaging Positive 18 56 8 25 .7 Negative 14 44 24 75 Apicitt test Positive 15 53 9 28 .44 Negative 17 47 23 72