After accounting for baseline values , the brace group had lower knee pain than the control group at 6weeks ( difference between groups -1.3 cm , 95 % CI -2.0 to -0.7 ; p < 0.001 ) and reduced PF BML volume ( difference -490.6 mm ( 3 ) , 95 % CI -929.5 to -51.7 ; p = 0.03 ) but not tibiofemoral volume ( difference -53.9 mm ( 3 ) , 95 % CI -625.9 to 518.2 ; p = 0.85 ) .