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Table 6 Comparison between percent changes in VAS and BPI Sleep Interference by Pain as predictive factors for being “Much” or “Very Much” improved on the PGIC

From: Relationship between pain relief, reduction in pain-associated sleep interference, and overall impression of improvement in patients with postherpetic neuralgia treated with extended-release gabapentin

Dependent variable Predictive factors Regression coefficient p-value
“Much” and “Very Much” improved on the PGIC Percent change in VAS 0.02988 <0.0001
Percent change in BPI Sleep Interference 0.00616 0.0082
Interaction between percent changes in VAS and BPI Sleep Interference 0.00005 0.4808