Table 2 Unadjusted and adjusted logistic regression of recovery as a function of the prognostic variables after multiple imputation. Unadjusted- and adjusted logistic regression of prognostic variables on recovery after multiple imputation

 observer-reported SDM (measured by OPTION)

1.026

0.986–1.068

0.206

1.033

0.9887–1.080

0.15655

1.007

0.975–1.041

0.663

1.0168

0.97981–1.0557

0.39937

 patient-reported SDM

1.002

0.992–1.012

0.745

0.998

0.987–1.009

0.7232

0.997

0.988–1.007

0.587

1.0065

0.995–1.016

0.30123

 GP-reported SDM (hardly) no SDM at all (< 40)

0.965

0.924–1.008

0.111

0.98560

0.91407–1.008

0.960102

1.006

0.990–1.023

0.458

1.006

0.988–1.025

0.509487

 GP-reported SDM intermediate level SDM (40–70)

1.021

0.995–1.047

0.110

1.022

0.993–1.051

0.145

 GP-reported SDM (relatively) high level SDM (> 70)

1.069

1.010–1.132

0.021*

1.0765

1.007–1.15049

0.031*

 male

1.230

0.846–1.789

0.278

1.249

0.894–1.743

0.193

 mean age

0.9777

0.950–1.006

0.123

1.012

0.987–1.038

0.339

 educational level secondary school educational completion related to primary school educational attainment only

0.490

0.260–0.924

0.0276*

0.520

0.291–0.930

0.028*

 educational level college, university educational completion related to primary school educational attainment only

1.299

0.782–2.156

0.3126

1.232

0.776–1.055

0.376

 pain severity (VAS; 0–100)

0.969

0.943–0.994

0.017*

0.956

0.933–0.981

0.001*

 functional disability score (RMD; 0–24)

1.026

0.953–1.104

0.497

0.988

0.926–1.054

0.715