Table 2.

Analysis of anxiety mean change scores, baseline – 4 weeks

Treatment arm	Anxiety
Gabapentin 900 mg
Model adjusted mean change score	−0.07
SE	0.77
Gabapentin 300 mg
Model adjusted mean	−1.77
SE	0.79
Placebo
Model adjusted mean	1.06
SE	0.82
P	0.005

Parameter estimates of the model (p values)

Coefficients: intercept = 36.57 (p < 0.001), 300 mg = −2.83 (p < 0.05), 900 mg = −1.12 (p > 0.10), cBase = 0.88 (p < 0.001), 300 mg × cBase = −0.28 (p < 0.001), 900 mg × cBase = −0.24 (p < 0.01); adjusted R² = 0.46