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Table 2 Intervention Program Effects. Results from regression adjusted by baseline HRQoL centred in the mean

From: Health related quality of life improvement in chronic non-specific neck pain: secondary analysis from a single blinded, randomized clinical trial

Health related quality of life (SF-36) aControl group (n = 64) Mean(SE) aDDN group (n = 64) Mean(SE) bMean diff. 95% Confidence Interval P-value
Physical Function
 A1 - A0 −4.36 (1.91) 6.54 (1.91) 10.9 (5.5 to 16.3) 0.00011
 A2 - A0 0.52 (1.36) 7.44 (1.36) 6.92 (3.08 to 10.76) 0.00052
 A3 - A0 −3.5 (2.01) 8.45 (2.01) 11.95 (6.28 to 17.62) 0.00006
 A4 - A0 −4.19 (1.84) 7.64 (1.84) 11.83 (6.62 to 17.04) 0.00002
Physical Role
 A1 - A0 0.64 (0.9) 7.95 (0.9) 7.31 (4.8 to 9.82) 0.00000
 A2 - A0 2.76 (1.02) 8.57 (1.02) 5.81 (2.95 to 8.68) 0.00010
 A3 - A0 1.46 (1.28) 9.87 (1.28) 8.41 (4.82 to 11.99) 0.00001
 A4 - A0 0.75 (1.1) 8.33 (1.1) 7.58 (4.51 to 10.65) 0.00000
Bodily Pain
 A1 - A0 5.59 (2.55) 12.81 (2.55) 7.22 (−0.08 to 14.52) 0.05241
 A2 - A0 6.97 (2.38) 13.08 (2.38) 6.11 (−0.72 to 12.94) 0.07890
 A3 - A0 −1.11 (2.95) 11.52 (2.95) 12.63 (4.2 to 21.07) 0.00364
 A4 - A0 4.54 (2.76) 13.31 (2.76) 8.77 (0.86 to 16.69) 0.03012
General Health
 A1 - A0 −0.82 (1.44) 4.16 (1.44) 4.98 (0.93 to 9.02) 0.01644
 A2 - A0 −1.3 (1.57) 2.58 (1.57) 3.87 (−0.52 to 8.27) 0.08381
 A3 - A0 1.55 (1.74) 5.46 (1.74) 3.91 (−0.97 to 8.79) 0.11564
 A4 - A0 −2.27 (1.58) 3.77 (1.58) 6.04 (1.62 to 10.46) 0.00783
Vitality
 A1 - A0 4.96 (1.96) 15.58 (1.96) 10.61 (5.11 to 16.12) 0.00021
 A2 - A0 2.94 (1.91) 12.07 (1.91) 9.13 (3.77 to 14.49) 0.00099
 A3 - A0 5.89 (2.13) 15.43 (2.13) 9.53 (3.56 to 15.51) 0.00199
 A4 - A0 −0.91 (2.27) 16.28 (2.27) 17.19 (10.84 to 23.55) 0.00000
Social Function
 A1 - A0 −3.75 (1.89) 8.83 (1.89) 12.58 (7.3 to 17.86) 0.00001
 A2 - A0 0.33 (1.96) 9.63 (1.96) 9.31 (3.82 to 14.8) 0.00105
 A3 - A0 3.41 (1.69) 9.09 (1.69) 5.69 (0.97 to 10.41) 0.01856
 A4 - A0 −6.92 (2.2) 11.61 (2.2) 18.53 (12.37 to 24.69) 0.00000
Emotional Role
 A1 - A0 0.51 (0.87) 3.13 (0.87) 2.62 (0.17 to 5.07) 0.03654
 A2 - A0 3.52 (0.92) 5.34 (0.92) 1.82 (−0.75 to 4.39) 0.16409
 A3 - A0 1.19 (0.92) 4.93 (0.92) 3.75 (1.18 to 6.32) 0.00463
 A4 - A0 −0.27 (1.07) 3.79 (1.07) 4.06 (1.06 to 7.06) 0.00831
Mental Health
 A1 - A0 1.43 (1.97) 10.81 (1.97) 9.38 (3.82 to 14.94) 0.00116
 A2 - A0 4.63 (1.6) 6.15 (1.6) 1.53 (−3.25 to 6.3) 0.52731
 A3 - A0 9.6 (1.49) 11.26 (1.49) 1.66 (−2.87 to 6.19) 0.46848
 A4 - A0 5.71 (1.71) 11.05 (1.71) 5.34 (0.38 to 10.3) 0.03498
SF-36 PSC
 A1 - A0 1.61 (0.65) 2.25 (0.65) 0.64 (−1.17 to 2.46) 0.48401
 A2 - A0 0.48 (0.65) 1.8 (0.65) 1.31 (−0.58 to 3.21) 0.17201
 A3 - A0 −1.41 (0.86) 1.86 (0.86) 3.26 (0.69 to 5.84) 0.01358
 A4 - A0 −1.22 (0.75) 1.92 (0.75) 3.14 (0.96 to 5.31) 0.00512
SF-36 MCS
 A1 - A0 0.3 (0.87) 4.25 (0.87) 3.95 (1.5 to 6.39) 0.00185
 A2 - A0 1.71 (0.58) 3.1 (0.58) 1.38 (−0.36 to 3.12) 0.11917
 A3 - A0 4.04 (0.66) 4.8 (0.66) 0.75 (−1.25 to 2.76) 0.45702
 A4 - A0 0.59 (0.75) 4.83 (0.75) 4.24 (2.07 to 6.41) 0.00018
  1. SE standard error; VX-V0 model for differences in the corresponding SF-36 dimension between visit 0 and visit X;
  2. aExpected change of SF-36 score between visits in a participant with average score at baseline;
  3. bExpected Mean Difference between groups; SF-36 PSC: Physical Component Summary; SF-36 MSC: Mental Component Summary