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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