Figure 4.

Histogram of the number of neutrophils per 100 μm² at the lesion center of the spinal cord at 24 h, 1, 2, and 6 weeks post injury. Using two-way ANOVA there was significant difference (P < 0.0001) found in both main effects, age and survival time, as well as the interaction (P < 0.0006). There was a significant difference (P < 0.001) between the 24 h time-point and the later time-points. # (P < 0.005) indicates a significant difference between the infants and the adult and juvenile groups based on Bonferroni's post-hoc test.