Table 1 (abstract P48). Psychometric properties of the patient reported outcome measures validated in Italian subjects with non-specific neck pain

Neck Disability Index

2 factors: activity of daily living (F#1), pain and concentration (F#2)

Total: α=.84

F#1: α=.82

F#2: α=.72

ICC=.85 (95%CI.78-.89)

F#1: ICC=.81

(95%CI .73-.87)

F#2: ICC=.83

(95%CI .76-.88)

r_s=.69 NPDS

r_s=.55 HADS-D

r_s=.44 NRS

r_s=.42 HADS-A

MDC= 3 points

F#1: MDC=1

F#2: MDC=1

ES=.66

SRM=1.09

GRI=.70

MCID=3.5 points

AUC=.96 (spec .81; sens .98)

Neck Pain and Disability Scale

3 factors: neck dysfunction related to general activities (F#1), neck pain and cognitive-behavioral aspects (F#2), neck dysfunction related to activities of the cervical spine (F#3)

Total: α=.94

F#1: α=.92

F#2: α =.86

F#3: α =.89

Total NPDS: r_s=.91

F#1: r_s=.89

F#2: r_s=.93

F#3: r_s=.92

r_P=-.47 SF-36

r_P=-.45 to -.17 SF-36 subscales

ES= .73

SRM=1.26

GRI=.73

MCID=10 points

AUC= .91

(Sens .93; Spec .83)

Neck Bournemouth Questionnaire

2 factors: pain & functioning (F#1); anxiety & depression (F#2)

Total: α=.89 (95%CI.84-92)

F#1: α=.88

(95%CI.83-92)

F#2:α=.90 (95%CI.86-94)

Not studied

r=.67-.70 NPDS

r=.63-.73 NRS

Not studied

MCID=5.5 points

AUC=.72 (Sens. 75%; Spec. 60%)

Core Outcome Measure Index for neck pain

Not studied

Not studied

ICC=.87

(95%CI .81-.91)

Pain: r_p=.45 NRS

Pain: r_p=.48 NPDS

Function: r_p=.49-.55 NPDS

QoL: r_p=-.44 EQ-5D

Disability: r_p=.45-.48 NPDS

MDC= 1.8/10 points

SEM=.65/10 points

SRM= 1.23

AUC: .73 (.62-.85) (Sens=.55; Spec=.88)

NeckPix®

1 factor

α=.95

ICC=.98

(95% CI .97-.98)

r_p=.76 TSK

r_p=.58 PCS

r_p=.52 NDI

r_p=.45 NRS

Not studied

Not studied