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Table 6 Utility weights and quality-adjusted life years estimates

From: Primum non nocere: shared informed decision making in low back pain – a pilot cluster randomised trial

  Number of patients Mean (SD) Mean treatment difference (95% CI) (Usual care – DSP)
DSP Usual care DSP Usual care
EQ-5D:      
 Baseline 84 61 0.4 (0.4) 0.5 (0.3) 0.01 (-0.10 to 0.12)
 4 month 58 39 0.5 (0.4) 0.7 (0.3) 0.13 (-0.01 to 0.26)
 Change from baseline to 4-month 57 38 0.1 (0.3) 0.2 (0.3) 0.05 (-0.05 to 0.16)
 QALY gains (AUC 0–4 month) 57 38 0.2 (0.1) 0.2 (0.1) 0.03 (-0.01 to 0 .07)
SF-6D:
 Baseline 85 59 0.6 (0.1) 0.6 (0.2) 0.02 (-0.03 to 0.06)
 4 months 57 39 0.7 (0.2) 0.7 (0.2) 0.03 (-0.03 to 0.10)
 Change from baseline to 4-month 57 37 0.1 (0.1) 0.1 (0.2) 0.03 (-0.03 to 0.08)
 QALY gains (AUC baseline to 4-month) 57 37 0.2 (0.1) 0.2 (0.1) 0.01 (-0.01 to 0 .03)
EQ-VAS:
 Baseline 83 60 54.7 (26.3) 59.0 (20.6) 4.35 (-3.72 to 12.42)
 4 months 55 37 68.0 (22.6) 67.7 (18.3) -0.28 (-9.14 to 8.59)
 Change from baseline to 4-month 54 36 9.0 (21.0) 8.1 (15.9) -0.98 (-9.16 to 7.20)
  1. Abbreviations: DSP decision support package; SD standard deviation; CI confidence interval; QALY quality-adjusted life years; AUC area under the curve.