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Table 2 Plasma α-tocopherol (μg/ml) and blood selenium (μg/g) concentrations in the sampled cows, by geographical region. n = Number of samples. Region 1: South-eastern Norway. Region 2: Rogaland county. Region 3: Western Norway. Region 4: Middle Nor-way (Trøndelag counties). Region 5: Northern Norway. Map of regions, see Fig. 1

From: Plasma Vitamin E and Blood Selenium Concentrations in Norwegian Dairy Cows: Regional Differences and Relations to Feeding and Health

Region Plasma α-tocopherol Blood selenium
  n Mean St. dev. n Mean St. dev.
1 93 6.5a,b 2.7 90 0.14m 0.04
2 49 7.3a,c 3.7 43 0.13m 0.04
3 70 7.5c 2.9 69 0.17n 0.05
4 68 6.9a,b,c 2.8 65 0.17n 0.04
5 34 5.9b 2.6 34 0.18n 0.04
Total 314 6.9 3.0 301 0.16 0.05
  1. a,b,c: Mean values without common letters are significantly different (p < 0.05).
  2. m,n: Mean values without common letters are significantly different (p < 0.001).