Table 3 Correlations between the ECOS-16 scores and the EUROQoL-5D, the four 7-point items scores and the MINI-OQLQ

EUROQol-5D

   Mobility

315

0.643

   Self-care

315

0.623

   Usual activities

315

0.594

   Pain/Discomfort

314

0.608

   Anxiety/Depression

315

0.555

   VAS^a

312

-0.610

General health status

316

0.712

Back pain

313

-0.741

Limitation in daily activities

313

-0.822

Emotional status

313

-0.791

MINI-OQLQ ^b

   Symptoms

104

-0.711

   Physical function

104

-0.670

   Activities of daily living

104

-0.455

   Emotional function

104

-0.473

   Leisure

104

-0.736