VAS 1 VAS 2 Lequesne (min 0/max 24) Johanson (min 16/max 100) self-care test (min 0/max 45)   pre post pre post pre post pre post 1 2 Mean 2,55 0,42* 5,36 1,39* 13,96 5,71* 52,65 81,39* 26,63* 3,36* Median 1,70 0 5,70 0 14,50 5,00 49,00 82,00 27,00 2,00 S.D. 2,84 0,86 2,81 2,11 3,44 3,93 12,05 8,62 10,36 6,98 Minimum 0 0 0 0 6 0 37 56 10 0 Maximum 8,70 3 9,90 8 19 17 83 100 43 39

Table 2: Evolution of pain and functional scales. SD: Standard deviation. VAS 1: visual analogue scale at rest. VAS 2: visual analogue scale after exercise test. Pre: preoperative. Post: 6 month postoperative. Self-care 1: punctuation at the beginning of occupational therapy. Self-care 2: punctuation at the end of occupational therapy. *p<0.000.