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Table 1 Study Cohort Demographics

From: Aging and CMV discordance are associated with increased immune diversity between monozygotic twins

  Total Young twins Middle-aged twins Young singlets Middle-aged singlets
Total participants (MZ twin pairs) 60 (23) 28 (14) 18 (9) 5 9
Female [n, %] 39 (65%) 19 (68%) 12 (67%) 3 (60%) 5 (65%)
Age (years) [median, IQR, range] 28.6, 27.0 (11.5–59.0) 23.6, 9.3 (12.5–30.7) 48.6, 10.7 (42.1–59.0) 15.8, 6.3 (11.5–22.5) 53.9, 4.0 (43.9–56.1)
Caucasian [n, %]* 47 (78%) 23 (82%) 11 (61%) 4 (80%) 9 (100%)
Asian [n, %] 10 (17%) 7 (25%) 3 (17%) 0 (0%) 0 (0%)
Black or African American [n, %] 5 (8%) 0 (0%) 4 (22%) 1 (20%) 0 (0%)
Other or declined to answer [n, %] 8 (13%) 4 (14%) 3 (17%) 1 (20%) 0 (0%)
CMV + [n, %] 32 (53%) 20 (71%) 5 (28%) 4 (80%) 6 (67%)
CMV +/+, n twin pairs (% of MZ pairs) 10 (43%) 9 (64%) 1 (11%)   
CMV −/−, n twin pairs (% of MZ pairs) 8 (35%) 3 (21%) 5 (56%)   
CMV +/−, n twin pairs (% of MZ pairs) 5 (22%) 2 (14%) 3 (33%)   
  1. *Participants could provide several races, so that the numbers add up to more than 100%