Table 3

Crude change in F2-isoprostane plasma levels before and after intervention, by treatment groupa

Free plasma F2-isoprostane (pmol/liter)a
Vitamin C (n = 42)Mixture (n = 39)Placebo (n = 45)All smokers (n = 126)
Before interventionb129.1 ± 67.1123.9 ± 52.3164.3 ± 80.2140.1 ± 70.0
After intervention114.7 ± 61.9122.7 ± 43.7159.7 ± 77.3
Change (pmol/liter)−14.4 ± 44.9−1.2 ± 56.1−4.6 ± 48.4
Change (%)−11.13%−0.99%−2.78%
  • a Unadjusted for baseline F2-isoprostane levels or covariates. Results are reported as means ± SD.

  • b Baseline differences between treatment groups: vitamin C versus placebo, P = 0.018; Mixture versus placebo, P = 0.008.