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Table 1 Descriptive statistics of cohorts S1 to S5

From: Long-term time trends in reactivated herpes simplex infections and treatment in Sweden

Cohorts S1 S2 S3 S4 S5
n 764 774 638 278 425
Age range, y* 35–91 35–81 59–90 60–91 35–95
Age, y, mean ± SDa 61.7 ± 14.1 59.9 ± 14.0 69.8 ± 9.0 74.1 ± 9.2 62.9 ± 16.0
Female, n (%) 411 (53.8) 436 (56.3) 376 (58.9) 139 (50.0) 218 (51.3)
APOEε4 carriers, n (%) 227 (29.7%) 226 (29.2%) 183 (28.7%) 72 (25.9%) 89 (20.9%)
Sampling year, n
Anti-HSV IgM positive samples/n (%)
 
 T1: 1988–1990 30/590 (5.1)     
 T2: 1993–1995 12/454 (2.6) 30/774 (3.9) 17/492 (3.5)   
 T3: 1998–2000 27/381 (7.1)   29/471 (6.2) 9/278 (3.2)  
 T4: 2003–2005 3/339 (0.9)   1/386 (0.3)   3/425 (0.7)
 T5: 2008–2010 1/246 (0.4)   1/222 (0.5)   
First sample, n
anti-HSV IgM positive samples/n (%)
35/764 (4.6) 30/774 (3.9) 19/638 (3.0) 9/278 (3.2) 3/425 (0.7)
  1. n: number; y: years; SD: standard deviation; APOEε4: apolipoprotein E allele 4; IgM” Immunoglobulin M
  2. aOn the date of the first included serum sample