Table 1: Means, standard deviations and confidence interval (CI) (95%) of ΔE values for each of the experimental groups.

GControl GNitrate GStrontium p
(±DP) 11.82 (±0.48) 11.72 (±0.68) 11.46 (±0.56) 0.61
CI (95%) 10.87 – 12.77 10.37 – 13.07 10.34 – 12.58