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Table 1 Study population characteristics

From: Telomere tracking from birth to adulthood and residential traffic exposure

Maternal n = 117
 Maternal age, years 26.7 ± 4.1
 Smoking during pregnancy, n 13 (11.1)
 Socioeconomic status: maternal education  
  Low 46 (39.3)
  Middle 28 (23.9)
  High 43 (36.8)
Birth n = 184
 Gestational age, weeks 37.2 ± 2.5
 Neonate birth weight, g 2589 ± 506
 Twin birth year 1976 ± 3.2
 Zygosity – Chorionicity  
  Dizygotic – Dichorionic 63 (34.2)
  Monozygotic – Dichorionic 55 (29.9)
  Monozygotic – Monochorionic 66 (35.9)
Adulthood n = 184
 Age, years 22.6 ± 3.1
 Sex  
  Male 93 (50.5)
  Female 91 (49.5)
 Body mass index, kg/m2 21.5 ± 2.7
 Smokers, n 64 (34.8)
 Gamma-glutamyl transferase, U/L 17.8 ± 11.1
 Total cortisol (μg/dL) 97.1 ± 41.4
 Complete-pair in final study  
  One twin 50 (42.7)
  Both twins 134 (57.3)
 Moved since birth 122 (66.3)
  1. Data presented are means ± standard deviation or number (percentage)