highly significantp < 0.0001
This analysis revealed highly significant main effects of dose (F 4,160 ≈ 848.5, p < 0.0001), wavelength (F 1,160 ≈ 252.2, p < 0.0001), and cellular age-status (F 1,160 ≈ 1466.8, p < 0.0001), indicating that metabolic activity varied significantly with PBM fluence, irradiation source, and replicative aging.