borderline significancep = 0.06
Furthermore, we noted different effects of age on the different rat strains ( F 3,69 = 14.8, p < 0.0001; Figure 4C ): in Wistar rats, ANP density decreased from PND10 to PND14 ( p < 0.0001) and then from PND20 to PND45 ( p < 0.04), whereas in OXYS rats, it was lower at PND10 ( p < 0.003), decreased to PND14 ( p < 0.0001) remaining lower than in Wistar rats with borderline significance ( p = 0.06), and then increased until PND20 ( p < 0.0001) becoming higher than in Wistar rats ( p < 0.005) and remaining at the increased level at PND45 ( p < 0.03).