a strong trendgold
Conversely, the 4-week group exhibited a strong trend toward neural adaptation at treatment completion (Visit 2, Day 28), where the mean increase in tear secretion was markedly attenuated and no longer reached conventional statistical significance (7.58 ± 4.98 mm/5 min pre-stimulation vs. 8.76 ± 4.92 mm/5 min post-stimulation, Δ = 1.18 ± 4.17 mm/5 min, 95% CI: − 0.01 to 2.37 mm/5 min, P = 0.051, Cohen's d = 0.28 ; Fig. 2 c).