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Table 3 The mean concentration of carotenoids and 25-hydroxy vitamin D 3 from DBS samples compared with plasma from other studies in theNordic countries

From: Feasibility of self-sampled dried blood spot and saliva samples sent by mail in a population-based study

  Lutein(μmol/L) Zeaxanthin(μmol/L) β-kryptoxanthin(μmol/L) α-carotene(μmol/L) β-carotene(μmol/L) Lycopene(μmol/L) 25-hydroxy D3(nmol/L) N (Carotenoids - vitamin D= References (Carotenoids – vitamin D)
Norway – DBS samples present study mean (SD) 1 0.23 (±0.13) 0.046 (±0.02) 0.16 (±0.11) 0.13 (±0.10) 0.43 (±0.29) 0.25 (±0.12) 43 (±12) 403 - 403 The present study
Norway previous study mean (SD) 0.17 (±0.07) 0.04 (±0.02) 0.16 (±0.11) 0.14 (±0.12) 0.50 (±0.32) 0.63 (±0.33) n.a 346 – n.a. [20]
Denmark study mean (SD) 0.34 (±0.14) 0.07 (±0.04) 0.23 (±0.21) 0.22 (±0.18) 0.47 (±0.38) 0.53 (±0.29) 75 (±29) 98 – 2,016 [22,23]
Sweden study mean (SD) 0.28 (±0.12) 0.06 (±0.04) 0.20 (±0.19) 0.20 (±0.22) 0.54 (±0.73) 0.52 (±0.27) 69 (±23) 97 – 116 [22,23]
Finland study mean (SD) 0.20 (±0.10) 0.04 (±0,02) 0.20 (±0.18) 0.19 (±0.13) 0.69 (±0.47) 0.09 (±0.06) 38.1 (±4.6) 620 – 1,283 [25,28]
  1. Values are means and SD (standard derivation).
  2. n.a. = not analyzed.
  3. 1In order to compare DBS results with results from analysis of plasma, all DBS values were multiplied with a factor of 2.