Pain Research and Treatment / 2012 / Article / Tab 9

Clinical Study

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

Table 9

Known-groups validity: t-tests of SAT scores by NPRS pain level at baseline (pooled dataset; )1.

SATBaseline NPRS pain level
High pain ( )Low pain ( ) -value
Mean (SD)Mean (SD)

(1) Pain relief0.4 (1.0)0.7 (0.9)0.001
(2) Activity level0.2 (0.8)0.4 (0.8)0.013
(3) Quality of life0.4 (0.8)0.5 (0.8)0.015
(4) Undergo treatment again1.0 (1.2)1.0 (1.2)0.841
(5) Compared to previous treatment0.4 (1.1)0.5 (1.1)0.080
SAT treatment effect subscale (Items 1, 2, and 3)1.0 (2.3)1.6 (2.3)0.002
SAT treatment satisfaction subscale (Items 4 and 5)1.3 (1.9)1.5 (2.0)0.275

NPRS: Numeric Pain Rating Scale; SAT: Self-Assessment of Treatment; SD: standard deviation.
nown-groups validity was assessed using t-tests to evaluate whether SAT items and subscale scores discriminated between patient groups by baseline pain level (high, low pain). Pooled dataset included data from two clinical trials, Studies C116 ( ) and C117 ( ).

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