marginally significantp = 0.05
At the 3-month follow-up, the between-group difference was marginally significant (GNT-W M = 7.75, 95% CI 6.91 to 8.59 vs GNT-D M = 8.56, 95% CI 7.72 to 9.41, mean difference = 0.81, 95% CI − 1.66 to 0.01, t 205 = − 1.94, p = 0.05, d = − 0.09).