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Table. 1 Summary of the study population (N = 45)

From: Genetic associations and shared environmental effects on the skin microbiome of Korean twins

  Mother MZ twin DZ twin Singletona Sum
No. 16 16 8 5 45
Age, mean (SD), y 62.1 (8.5) 31.0 (3.6) 36.8 (5.1) 41.2 (8.4)  
Sex      
Female, no. 16 10 4 3 33
Male, no. - 6 4 2 12
Humidity (SD), AUbc 30.1 (20.6) 36.3 (29.3) 19.0 (21.3) 28.7 (17.3)  
Pigmentation (SD), AUbd 124.3 (83.4) 97.9 (72.3) 65.6 (73.1) 111.6 (64.8)  
  1. aThree MZ and two DZ twins were analyzed as singletons, since one of their associated twins was excluded due to antibiotic use
  2. bDermatologic phenotypes were measured from 12 mothers, 15 MZ twins, and 5 DZ twins
  3. cThe level of skin humidity is expressed using arbitrary units (AU) as given by the device (Corneometer®CM825). Corneometry values greater than 45 AU indicate sufficiently moisturized skin, while values less than 45 AU indicate dry skin
  4. dA melanin index of 0–150 AU indicates light skin tone, and values of 150–250 AU indicate mid-tone skin pigmentation