Oxidative Stress and Longevity in Okinawa: An Investigation of Blood Lipid Peroxidation and Tocopherol in Okinawan Centenarians

Table 3

Mean intracellular (red blood cell) tocopherol levels by age strata (total and subtype) (μg/ml).

		20s	30s	70s	80s	100s
α Toc	Male; (𝑛)	2.47±0.49 (4)**	2.43±0.35 (8)**	2.48±0.25 (17)***	2.46±0.28 (5)*	1.51±0.84 (19)
	Female (𝑛)	2.53±0.35 (4)	2.79±0.82 (8)	2.61±0.76 (30)***	2.91±0.87 (3)	2.00±1.13 (77)
	Total; (𝑛)	2.50±0.40 (8)**	2.61±0.64 (16)**	2.56±0.62 (47)***	2.66±0.61 (8)*	1.89±1.09 (96)
β Toc	Male; (𝑛)	0.05±0.00 (4)	0.05±0.01 (8)	0.04±0.01 (17)*	0.05±0.01 (5)	0.08±0.04 (10)
	Female (𝑛)	0.04±0.00 (4)	0.04±0.01 (8)	0.05±0.02 (30)**	0.06±0.02 (3)	0.10±0.08 (37)
	Total; (𝑛)	0.05±0.01 (8)	0.04±0.01 (16)	0.05±0.02 (47)**	0.05±0.01 (8)	0.09±0.07 (47)
γ Toc	Male; (𝑛)	0.35±0.06 (4)	0.31±0.12 (8)	0.27±0.09 (17)	0.39±0.10 (5)	0.25±0.16 (18)
	Female (𝑛)	0.35±0.08 (4)	0.32±0.11 (8)	0.33±0.17 (30)*	0.31±0.16 (3)	0.23±0.19 (74)
	Total; (𝑛)	0.35±0.07 (8)	0.32±0.11 (16)	0.31±0.15 (47)*	0.35±0.13 (8)	0.24±0.18 (92)
Total Toc	Male; (𝑛)	2.87±0.50 (4)***	2.76±0.41 (8)***	2.79±0.30 (17)***	2.89±0.37 (5)*	1.80±1.00 (19)
	Female (𝑛)	2.92±0.39 (4)***	3.15±0.75 (8)	2.98±0.82 (30)***	3.24±0.76 (3)***	2.30±1.22 (77)
	Total; (𝑛)	2.90±0.42 (8)***	2.95±0.62 (16)***	2.91±0.67 (47)***	3.05±0.57 (8)***	2.19±1.19 (96)

Toc: Tocopherol.
Significant difference centenarians and individual age groups: *𝑃<.05; **𝑃<0.01; ***𝑃<.001.