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Table 1 Characteristics of the study sample

From: The epigenetic etiology of cardiovascular disease in a longitudinal Swedish twin study

Characteristics N or mean value
Individuals (MZ pairs, DZ pairs, single twins) 535 (83, 155, 59)
Zygosity
MZ 187
DZ 347
Unknown 1
Repeated measures of DNA methylation per person
1 145
2 121
3 119
4 98
5 49
6 3
Female (%) 313 (58.5)
Baseline age (years), mean (SD) 72.7 (9.3)
Baseline current smokers (%) 85 (15.9)
Non-stroke CVD (%) 212 (39.6)
Overall stroke (%) 108 (20.2)
Ischemic stroke (%) 85 (15.9)
Statin user (%) 95 (18.0)
  1. MZ monozygotic twins, DZ dizygotic twins, CVD cardiovascular disease, SD standard deviation