Table 3

Linear regression analysis of antral, plasma, and gastric juice ascorbic acid and total vitamin C, with MDA as the dependent variable, before and after adjustment for H. pylori infection

Univariate analysisAdjusted for H. pylori infection
Regression slopea (95% CI)PRegression slopea (95% CI)P
Log antral AAb0.08 (−0.002 to 0.17)0.060.08 (0.003 to 0.15)0.04
Log antral TVC0.13 (0.03 to 0.23)0.020.11 (0.02 to 0.20)0.02
Log gastric juice AA−0.04 (−0.10 to 0.02)0.20.03 (−0.03 to 0.08)0.4
Log gastric juice TVC−0.09 (−0.16 to −0.01)0.020.005 (−0.08 to 0.07)0.9
Log plasma AA−0.17 (−0.20 to −0.04)0.005−0.07 (−0.14 to 0.008)0.08
Log plasma TVC−0.14 (−0.24 to −0.04)0.005−0.08 (−0.17 to 0.01)0.09
  • a The regression slope represents the increase in log MDA for each unit increase in the log-transformed variable.

  • b AA, ascorbic acid; TVC, total vitamin C.