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Table 1 Comparison of semen parameters between overall and 4 age groups

From: Infertile men older than 40 years are at higher risk of sperm DNA damage

Parameters Overall ≤30 y 31 – 40 y <40 y >40 y
(n = 69) (n = 298) (n = 367) (n = 105)
  (n = 472) 69/472 (14.6%) 298/472 (63.1%) 367/472 (77.8%) 105/472 (22.2%)
Volume (mL) 3.1 ± 1.5 3.4 ± 1.5 3 ± 1.4 3.1 ± 1.4 3.1 ± 1.75
Concentration (X106/mL) 42.01 ± 50.58 36.66 ± 39.72 42.62 ± 52.23 41.50 ± 50.12 43.80 ± 52.37
Motility (%) 44.7 ± 19.7 44.3 ± 14.4 45.2 ± 19.5 45.0 ± 18.6 43.5 ± 22.9
Normal Morphology (%) 3.2 ± 2.9 3.1 ± 2.7 3.1 ± 2.9 3.1 ± 2.9 3.3 ± 3.1
TAC (micromolar trolox) 1964.42 ± 683.77 2114.02 ± 548.93 1948.80 ± 689.78 1974.03 ± 671.09 1930.87 ± 727.40
ROS (RLU/sec/X106) 267.7 (59.3; 1277.3) 311.1 (38.4; 1927.3) 256.9 (65.9; 1149.1) 265.6 (63.8; 1204.1) 429.9 (54.9; 1514.0)
Sperm DNA damage (%) 19.9 ± 15.3 16.7 ± 11.2 19.1 ± 14.6 18.7 ± 14. 1 24.4 ± 18.5a,b,c,d
  1. The results are presented as mean ± SD for all the parameters except ROS which is presented as median (25th; 75th percentile).
  2. aP value <0.05 when >40 y group was compared with the overall group.
  3. bP value <0.05 when >40 y group was compared with the group ≤30 y.
  4. cP value <0.05 when >40 y group was compared with the group 31-40 y
  5. dP value <0.05 when >40 y group was compared with the group <40 y.