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Table 5 Correlation between cheek cell FA with FA of plasma, RBC and PBMC

From: Cheek cell fatty acids reflect n-3 PUFA in blood fractions during linseed oil supplementation: a controlled human intervention study

  Baseline Intervention
  Total subjects Test group – linseed oil mix Control group – olive oil
  (n = 38) (n = 46) (n = 30)
  Cheek cell correlation Plasma correlation Cheek cell correlation Cheek cell correlation
  Plasma RBC PBMC RBC PBMC Plasma RBC PBMC Plasma RBC PBMC
  r 1 r 1 r 1 r 1 r 1 r 1 r 1 r 1 r 1 r 1 r 1
SFA            
 C16:0 -0.08 -0.1 0.09 0.80** 0.31 -0.01 -0.2 -0.1 0.34 -0.17 0.34
 C18:0 0.04 -0.16 -0.07 0.60** 0.15 0.09 0.04 -0.14 0.05 0.22 -0.03
n-9 MUFA            
 C18:1n-9 (OA) 0.34* 0.06 0.19 0.16 0.26 0.11 -0.05 -0.01 0.43* 0.25 0.2
 Total n-9 0.33* 0.08 0.16 0.17 0.23 0.11 -0.05 0 0.43* 0.29 0.25
n-6 PUFA            
 C18:2n-6 (LA) -0.59 0.21 0.31 0.58** -0.13 -0.01 0.11 0.12 0.34 0.65** 0.73**
 C18:3n-6 0.33* 0.44** 0.1 0.72** 0.07 0.16 0.35* 0.14 0 0.24 0.40*
 C20:3n-6 0.41** 0.47** 0.44** 0.86** 0.70** 0.44** 0.50** 0.39** 0.56** 0.65** 0.64**
 C20:4n-6 (AA) 0.54** 0.54** -0.21 0.54** 0.09 0.41** 0.41** -0.15 0.38* 0.50** 0.12
 C22:5n- 6 0.52** 0.58** 0.60** 0.79** 0.76** 0.22 0.27 0.2 0.52** 0.68** 0.54**
 Total n-6 -0.22 -0.07 -0.11 0.22 -0.04 -0.19 -0.25 -0.05 0.23 0.44* 0.22
n-3 PUFA            
 C18:3n-3 (ALA) 0.17 0.06 0.07 0.70** 0.43** 0.33* 0.43** 0.22 0.31 0.1 -0.17
 C20:4n-3 (ETA) 0.54** 0.59** 0.48** 0.92** 0.80** 0.36** 0.58** 0.48** 0.60** 0.59** 0.70**
 C20:5n-3 (EPA) 0.81** 0.82** 0.62** 0.84** 0.72** 0.69** 0.72** 0.54** 0.84** 0.83** 0.83**
 C22:5n-3 (DPA) 0.73** 0.67** 0.47** 0.83** 0.74** 0.55** 0.41** 0.49** 0.48** 0.51** 0.37*
 C22:6n-3 (DHA) 0.68** 0.64** 0.59** 0.88** 0.80** 0.50** 0.59** 0.56** 0.61** 0.59** 0.64**
 Total n-3 0.58** 0.61** 0.50** 0.85** 0.66** 0.45** 0.57** 0.55** 0.58** 0.64** 0.60**
Sum            
 Σ SFA -0.24 -0.25 0.05 0.52 -0.25 -0.05 -0.24 0.01 0.27 0.01 0.09
 Σ MUFA 0.27 0.06 -0.06 0.12 0.14 0.00 0.05 -0.09 0.32 0.24 0.06
 Σ PUFA -0.21 -0.07 -0.2 0.23 -0.10 -0.16 -0.12 -0.01 0.17 0.09 0.11
  1. Results of day 7 and day 56 of each intervention combined.
  2. 1r Pearson's correlation coefficient; * P ≤ 0.05, ** P ≤ 0.01.