Table 5 Hypothesis testing in construct validity and construct responsiveness of the Patient Enablement Instrument of Back Pain

ODI_{sum. score}

PEI-BP_{sum. score}

a

 < − 0.5

− 0.5407

a

 < − 0.5

− 0.5552

BIPQ_{sum. score}

PEI-BP_{sum. score}

a

 < − 0.5

− 0.5808

a

 < − 0.5

− 0.5375

BIPQ_q.3

PEI-BP_{sum. score}

b

 > 0.5

0.4341

b

 > 0.5

0.5484

BIPQ_q.7

PEI-BP_{q. 2}

b

 > 0.5

0.5962

b

 > 0.5

0.4635

FABQ_{phys. activity}

PEI-BP_{sum. score}

c

− 0.3 to − 0.5

− 0.3043

c

− 0.3 to − 0.5

− 0.4301

SF-36 Mental health

PEI-BP_{sum. score}

d

0.3 to 0.5

0.4986

d

0.3 to 0.5

0.4069

Educational level

PEI-BP_{sum. score}

e

 ≤ 0.3

0.1259

Number of previous episodes of LBP

PEI-BP_{sum. score}

f

 ≥ − 0.3

− 0.0365