Sleep and Arousals Including condition alone did not significantly improve model fit (χ 2 (3) =0.003, p =0.99) but the inclusion of sleep stage resulted in a highly significant improvement over the null model (χ 2 (2) = 962.46, p <0.001).
While pairwise comparisons in the sigma band only reached marginal significance, very large effect sizes suggested higher sigma power during the acclimation night compared to the other conditions (acclimation vs baseline: p =0.064, d = 1.23; acclimation vs 0–100%: p =0.069, d = 1.23; acclimation vs 0–600%: p =0.100, d = 1.14).
Notably, while the comparisons between 0–100% and Baseline and between Baseline and Acclimation were marginally significant, they exhibited large effects, indicating reductions in time asleep.
Post-hoc pairwise comparisons across condition revealed that while differences between Baseline and 0–100% conditions did not reach statistical significance, they represented a medium effect size.