Pain Research and Treatment / 2012 / Article / Tab 10

Clinical Study

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

Table 10

Concurrent validity: ANOVA models of NPRS change scores by SAT scores at Week 12 (pooled dataset; )1.

SATNPRS change scores at Week 12
Pain nowAverage pain in last 24 hours
NLS mean (SE) -valueNLS mean (SE) -value

(1) How do you assess your pain level after treatment in this study?Better341−2.5 (0.1)<0.0001339−2.9 (0.1)<0.0001
No change310−0.3 (0.1)303−0.5 (0.1)
Worse470.8 (0.3)46(0.2)
(2) How do you assess your activity level after treatment in this study?Better210−2.9 (0.1)<0.0001209−3.2 (0.1)<0.0001
No change453−0.7 (0.1)445−1.0 (0.1)
Worse350.4 (0.4)34−0.1 (0.3)
(3) How has your quality of life changed after treatment in this study?Better266−2.6 (0.1)<0.0001265−3.1 (0.1)<0.0001
No change410−0.6 (0.1)402−0.8 (0.1)
Worse221.2 (0.4)21(0.4)
(4) Would you undergo this treatment again?Better451−1.8 (0.1)<0.0001445−2.1 (0.1)<0.0001
No change174−0.4 (0.2)172−0.8 (0.1)
Worse73−0.3 (0.3)71−0.5 (0.2)
(5) How do you compare the treatment you received in this study to previous medication or therapies for your pain?Better296−2.2 (0.1)<0.0001294−2.6 (0.1)<0.0001
No change312−0.7 (0.1)306−0.9 (0.1)
Worse90−0.4 (0.2)88−0.8 (0.2)
SAT treatment effect subscale (Items 1, 2, and 3)Better359−2.4 (0.1)<0.0001357−2.8 (0.1)<0.0001
No change280−0.3 (0.1)273−0.5 (0.1)
Worse590.9 (0.3)580.2 (0.2)
SAT treatment satisfaction subscale (Items 4 and 5)Better448−1.8 (0.1)<0.0001443−2.1 (0.1)<0.0001
No change141−0.5 (0.2)138−0.9 (0.2)
Worse109−0.2 (0.2)107−0.5 (0.2)

ANOVA: analysis of variance; LS: least-squares; NPRS: Numeric Pain Rating Scale; SAT: Self-Assessment of Treatment; SE: standard error.
oncurrent validity was evaluated using ANOVA to compare NPRS changes in pain by SAT response levels (patients improved; no change; worsened). Pooled dataset included data from two clinical trials, Studies C116 ( ) and C117 ( ).

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