Pain Research and Treatment / 2012 / Article / Tab 7

Clinical Study

Validation of the Self-Assessment of Treatment Questionnaire among Patients with Postherpetic Neuralgia

Table 7

Construct validity: correlations between SAT and PRO measures (pooled dataset; )1.

Spearman correlations2
SAT 1
(Pain relief)
SAT 2
(Activity level)
SAT 3
(Quality of life)
SAT 4
(Undergo treatment again)
SAT 5
(Compared to previous treatment)
3-Item SAT treatment effect subscale2-Item SAT treatment satisfaction subscale

PGIC0.900.680.770.440.620.890.61

CGIC30.850.630.730.480.640.830.64

NPRS change scores
 Pain now−0.60−0.47−0.51−0.30−0.37−0.59−0.38
 Average 24 hour pain−0.69−0.53−0.60−0.35−0.45−0.68−0.46

BPI change scores
 Pain in last 24 hours—at worst−0.64−0.50−0.53−0.28−0.40−0.63−0.39
 Pain in last 24 hours—at least−0.52−0.38−0.44−0.27−0.32−0.50−0.34

SF-MPQ present pain intensity change scores−0.45−0.41−0.43−0.20−0.29−0.47−0.29

SF-36v2 change scores
 Physical functioning0.200.160.250.1440.1540.230.16
 Bodily pain0.430.400.400.270.290.460.33
 Vitality0.250.230.210.0950.1440.250.144

BPI: Brief Pain Inventory; CGIC: Clinician Global Impression of Change; NPRS: Numeric Pain Rating Scale; PGIC: Patient Global Impression of Change; SAT: Self-Assessment of Treatment.
onstruct validity of SAT item and subscales were evaluated by examining relationships between SAT items and subscales with component scores of conceptually-related outcome measures using Spearman correlation coefficients. Pooled dataset included data from two clinical trials, Studies C116 ( ) and C117 ( ).
ivariate correlations were significant at , except where noted otherwise.
tudy C117 only.
.
.

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