Table 2.

Responsiveness and minimal important difference (MID) estimates for SF-36 and patient-reported outcomes.

MID Improvement, (n = 17)MID Deterioration, (n = 21)Correlation with AnchorEffect SizeSRM
Pain−14.71 (31.25)−0.95 (18.82)**0.30*−0.55−0.49
PGA−11.76 (25.06)−2.86 (18.88)*0.31**−0.50−0.55
HAQ−0.27 (0.42)0.095 (0.18)**0.30**−0.22−0.22
SF-36 scales
PF4.41 (14.99)−6.25 (18.77)**−0.34**0.350.37
RP11.76 (44.30)−11.25 (36.70)*−0.29*0.410.39
BP12.35 (19.83)−5.45 (15.63)**−0.41**0.530.59
GH−2.94 (12.34)−3.75 (15.02)*−0.30**0.250.24
VT7.94 (11.46)−5.25 (15.68)**−0.28**0.280.35
SF5.06 (22.50)−2.78 (17.45)*−0.27*0.260.31
RE3.96 (52.60)−10.0 (37.62)*−0.23*0.270.26
MH1.41 (8.36)0.00 (14.85)*−0.28*0.190.31
PCS3.74 (8.51)−3.97 (10.46)**−0.43**0.490.55
MCS1.77 (8.60)−0.70 (8.37)*−0.24*0.190.28
  • * If p < 0.05.

  • ** If p < 0.01.

  • Definitions as in Table 1.