Fig. 5

Peripheral white blood cell numbers decrease after decompression. a Scheme of the time points assessed for blood collection based on weeks after decompression (i), the bony formation between the material and laminae was removed at 12 weeks after implantation to achieve decompression (ii–iii), and summary of the experimental groups (iv). At 5 weeks after decompression, the number of all cell types (b–d) was significantly reduced (*p < 0.05, **p < 0.01), without significant changes observed at 2 weeks. Data were analyzed by a two-way ANOVA and are presented as mean ± SEM of 3–4 independent experiments