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Table 2 Non-parametric (Spearman) correlation coefficients (r) for relationships between sperm DFI and other parameters

From: Analysis of human sperm DNA fragmentation index (DFI) related factors: a report of 1010 subfertile men in China

Variables Number DFI
r P value
Age 1010 0.115 <0.001
BMI 1010 -0.051 0.108
WC 1010 -0.065 0.050
WHR 1010 -0.009 0.785
WHtR 1010 -0.057 0.068
Abstinence time 1010 0.171 <0.001
Semen volume 978 0.145 <0.001
Sperm concentration 978 -0.115 <0.001
Total sperm count 978 -0.054 0.091
Progressive motility 978 -0.474 <0.001
Sperm motility 978 -0.487 <0.001
Normal sperm morphology 978 -0.222 <0.001
TNPMS 978 -0.288 <0.001
Abnormal head 978 0.184 <0.001
Intact acrosome 978 -0.191 <0.001
Acrosomal enzyme activity 978 -0.307 <0.001
Seminal plasma total α-glucotase 959 0.089 0.057
Seminal plasma GGT 959 0.080 0.063
Seminal plasma fructose 959 0.002 0.957
Seminal plasma zinc 959 0.137 <0.001
Serum TG 974 0.026 0.411
Serum TC 974 -0.007 -0.820
Serum LDL 974 -0.005 -0.865
Serum HDL 974 0.008 0.814
Serum LH 954 0.134 <0.001
Serum FSH 954 0.113 <0.001
Serum estradiol 954 -0.039 0.234
Serum testosterone 954 -0.042 0.194
Serum SHBG 954 0.038 0.239
Seminal plasma TG 887 0.136 <0.001
Seminal plasma TC 887 0.131 <0.001
Seminal plasma LDL 887 0.013 0.695
Seminal plasma HDL 887 -0.064 0.058
Seminal plasma FSH 396 0.184 <0.001
Seminal plasma estradiol 396 0.099 0.048*
Seminal plasma testosterone 396 -0.039 0.433
  1. TNPMS Total normal-progressively motile spermatozoa count, SHBG sex hormone-binding globulin. *: P<0.05. Sperm DFI was positively related to age and abstinence time. Sperm DFI was also positively related to semen volume and the percentage of abnormal sperm head, while negatively related to sperm concentration, progressive motility, sperm motility, the percentage of normal sperm morphology, TNPMS, the percentage of intact acrosome sperm and acrosomal enzyme activity. Sperm DFI was positively related to seminal plasma zinc but unrelated to seminal plasma α-glucotase, GGT and fructose levels. There was no any significant correlation between sperm DFI and obesity-associated markers such as BMI, WC, WHR and WHtR, and serum lipids levels. However, sperm DFI was positively related to seminal plasma TG and TC levels. Sperm DFI was also positively related to serum LH and FSH levels and seminal plasma FSH and estradiol levels, but unrelated to serum and seminal plasma testosterone levels