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Table 1 Basic demographics at baseline of study subjects who completed the study

From: Differential effects of dietary supplements on metabolomic profile of smokers versus non-smokers

  Overall Non-smokers Smokers  
Characteristic (N = 28) (N = 17) (N = 11) P
Mean age, in years (SD) 56.0 (5.6) 55.7 (6.3) 56.3 (5.0) 0.82
Mean BMI, in kg/m2 (SD) 24.7 (3.3) 24.0 (2.6) 25.5 (3.3) 0.24
Percentage postmenopausal at baseline 67.9 52.9 90.9 0.45
Percentage using hormone therapy at baseline and during study 14.3 23.5 0.0 0.19
Percentage of subjects with caffeine intake 96.4 94.1 100 0.09
  1. The basic demographics at baseline of study subjects who completed the study were equivalent between smokers and non-smokers. P-values were calculated using t-test or Fisher's exact test (two-tailed). BMI, body mass index; SD, standard deviation.