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Table 1 General characteristics of the three age groups studied

From: The effects of male age on sperm analysis by motile sperm organelle morphology examination (MSOME)

Characteristic Total Group I
(≤ 35 years)
Group II
(36-40 years)
Group III
(≥ 41 years)
Patients 975 407 292 276
Age (years) 37.5 ± 6.7 31.7 ± 2.7 37.8 ± 1.3 45.8 ± 5.2
Fathered at least one child 36% 23.1%a,b 33.6%a,c 57.7%b,c
  (351/975) (94/407) (98/292) (159/276)
Duration of infertility (years) 3.7 ± 3.3 3.0 ± 2.2d,e 3.6 ± 2.9d,f 5.0 ± 4.5e,f
Abstinence (mean ± SD) 3.5 ± 1.3 3.6 ± 1.3 3.5 ± 1.4 3.5 ± 1.3
Sperm Parameters* (mean ± SD)     
-volume (ml) 2.7 ± 0.13 2.8 ± 1.2 2.9 ± 1.2 2.6 ± 1.4
-total sperm count x106/ml 61.2 ± 53.8 62.9 ± 53.0 64.8 ± 53.2 56.0 ± 51.8
-motility (rapid+slow progression)% 58.9 ± 17.9 59.9 ± 17.3 57.6 ± 18.7 54.4 ± 19.2
-leukocytes (x106) 0.4 ± 0.9 0.4 ± 0.7 0.4 ± 1.2 0.4 ± 0.7
-vitality (%) 66.5 ± 15.1 68.7 ± 14.1 65.6 ± 15.7 64.2 ± 15.3
Sperm DNA fragmentation (%) 17.1 ± 9.6 15.6 ± 9.1g,h 18.1 ± 9.7g 18.3 ± 10.2h
Varicocele (%) 17 14.7 18.5 18.8
  (166/975) (60/407) (54/292) (52/276)
Tobacco use (%) 11.9 13.8 10.3 10.9
  (116/975) (56/407) (30/292) (30/276)
Regular alcohol use (%) 64.2 65.3 66.4 60.1
  (626/975) (266/407) (194/292) (166/276)
Vitamin supplement use (%) 15.5 15.5 13.7 17.4
  (151/975) (63/407) (40/292) (48/276)
  1. *Categorised according to World Health Organization guidelines [36]
  2. Values within rows with the same superscript letter were significantly different:
  3. a-b-c-e-d-f-g-h P < 0.05