Lysophosphatidic acid plasma concentrations in healthy subjects: circadian rhythm and associations with demographic, anthropometric and biochemical parameters.

There were no statistically significant differences in LPA plasma concentrations between smokers ( N = 21) and non-smokers ( N = 71) ( p = 0.91). In circadian rhythm analysis, LPA differed slightly depending on the time of the day, but this relationship did not reach statistical significance (Fig. 7 ).

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