Table 5: Correlation between selected polyunsaturated fatty acids and fatty acid ratios in tumour and normal mucosal biopsies and plasma phospholipids (PL) and concentrations (weight%) in colorectal cancer patients ( )a.

normal mucosa ( )tumour tissue ( )

EPA + DHA concentration in plasma PL correlated with tissue concentration of
  18:2 -6 (LA)−0.300.05
  20:4 -6 (AA)0.43b−0.05
  Sum LA + AA0.150.001
  20:5 -3 (EPA)0.44c0.51c
  22:6 -3 (DHA)0.71d0.44c
  Sum EPA + DHA0.66d0.50c
  Ratio AA/EPA−0.07−0.55d
  Ratio -3/ -6 fatty acids0.77d0.70d
LA + AA concentration in plasma PL correlated with tissue concentration of
  18:2 -6 (LA)0.50c0.12
  20:4 -6 (AA)−0.220.24
  Sum LA + AA0.140.25
  20:5 -3 (EPA)−0.17−0.20
  22:6 -3 (DHA)−0.33−0.18
  Sum EPA + DHA−0.29−0.20
  Ratio AA/EPA−0.070.36b
  Ratio -3/ -6 fatty acids−0.47c−0.42b

aAbbreviations are as follows: AA: arachidonic acid; DHA: docosahexaenoic acid; EPA: eicosapentaenoic acid; LA: linoleic acid; PL: phospholipids; : Pearson correlation coefficient.
bSignificant correlation ( ).
cSignificant correlation ( ).
dSignificant correlation ( ).