Table 2: Mean and standard deviation of the area of the lacunae in μm2.

Zone 1Zone 2Zone 3Zone 4

16–20 yrs 8 5 . 9 9 ± 0 . 4 9 1 6 5 . 3 8 ± 1 3 . 8 9 1 7 0 . 6 7 ± 5 . 7 7 1 5 1 . 5 2 ± 1 9 . 1 7
21–30 yrs 4 6 . 6 4 ± 1 2 . 6 3 1 5 7 . 7 9 ± 4 5 . 2 9 1 5 7 . 9 7 ± 1 7 . 6 2 1 6 0 . 3 0 ± 3 4 . 9 9
31–40 yrs 6 0 . 1 2 ± 3 3 . 9 5 1 4 1 . 3 0 ± 7 . 4 7 1 6 6 . 2 4 ± 2 1 . 1 6 1 7 4 . 9 3 ± 4 9 . 4 8
41–50 yrs 5 5 . 7 3 ± 2 . 8 0 1 5 6 . 1 1 ± 3 4 . 2 2 2 0 0 . 6 5 ± 4 . 4 6 1 3 1 . 5 7 ± 1 2 . 5 1
51–60 yrs 7 7 . 7 5 ± 8 . 4 2 1 4 7 . 0 7 ± 1 4 . 3 7 2 1 8 . 4 4 ± 3 6 . 1 8 1 5 9 . 0 6 ± 3 8 . 9 8
61–70 yrs 3 5 . 9 9 ± 0 . 4 2 2 0 4 . 6 0 ± 3 4 . 2 1 2 2 5 . 6 5 ± 1 0 6 . 5 2 1 6 0 . 4 2 ± 4 4 . 2 3
71–80 yrs 6 1 . 5 0 ± 3 0 . 3 5 1 8 9 . 7 3 ± 4 . 7 7 1 9 8 . 1 4 ± 1 4 . 3 3 1 0 5 . 4 9 ± 4 . 5 9
81–90 yrs 6 1 . 2 8 ± 1 5 . 9 0 1 5 4 . 6 3 ± 4 . 3 8 1 9 2 . 3 5 ± 4 3 . 7 5 1 5 6 . 7 5 ± 3 0 . 6 9