Figure 1. PSG-derived WASO was significantly lower in the gabapentin 250 and 500 mg groups compared with placebo.

Mean (standard deviation) values are presented. *** p ≤ 0.001 vs. placebo. ^†† p = 0.003 vs. 250 mg (based on analysis of variance model). PSG, polysomnography; WASO, wake after sleep onset.