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Table 3 Differences in clinical skin aging parameters after 12 weeks of study supplementation as assessed by dermatologist raters

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

Clinical skin aging
Parameter
Overall (N = 28) Non-smokers (N = 17) Smokers (N = 11)
  Mean SD P Mean SD P Mean SD P
Fine wrinkling -0.571 2.516 0.24 +0.235 1.821 0.60 -1.769 2.743 0.04
Deep wrinkling +0.033 3.054 0.95 -1.853 1.579 0.00 +2.500 2.754 0.01
Surface evenness +0.429 1.874 0.24 +0.882 1.996 0.09 +0.154 1.819 0.77
Elasticity +0.161 2.415 0.73 +1.353 1.730 0.01 -1.115 2.468 0.13
Glow +1.179 3.151 0.06 +0.235 3.073 0.76 +2.538 2.570 0.00
Hydration -0.786 2.234 0.07 +0.294 0.985 0.24 -1.846 2.824 0.04
  1. Smokers showed decreased fine wrinkles and increased glow, but decreased hydration. Non-smokers showed decreased deep wrinkling and increased elasticity. Values are the average of scores given by the four raters. Negative values indicate decrease, positive values indicate increase. P-values calculated using two-sided t-tests. SD, standard deviation.