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Effect of the oral intake of astaxanthin on semen parameters in patients with oligo-astheno-teratozoospermia: a randomized double-blind placebo-controlled trial


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Figure 1

CONSORT flow chart of study presenting the inclusion criteria, randomization and follow-up of participants.
CONSORT flow chart of study presenting the inclusion criteria, randomization and follow-up of participants.

Comparison of baseline characteristics of patients in astaxanthin and placebo groups

CharacteristicAstaxanthin (n = 37)Placebo (n = 35)p-value
Age (years)35.0 ± 5.236.4 ± 5.50.276
BMI (kg/m2)25.9 ± 3.827.1 ± 4.60.162
Smoking (no. of cigarettes smoked / day)4.8 ± 6.83.6 ± 6.80.264
Sperm concentration (million /ml)

= the analysis for total sperm number and sperm concentration was made for 34/37 patients from the astaxanthin group and 35/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

6.9 ± 5.75.4 ± 5.80.297
Total sperm number (million/ejaculate)

= the analysis for total sperm number and sperm concentration was made for 34/37 patients from the astaxanthin group and 35/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

23.9 ± 28.415.6 ± 21.00.164
Total sperm motility (%)

= the analysis for total and progressive sperm motility was made for 25/37 patients from the astaxanthin group and 20/35 patients from placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

29.9 ± 14.838.2 ± 14.80.063
Progressive sperm motility (%)

= the analysis for total and progressive sperm motility was made for 25/37 patients from the astaxanthin group and 20/35 patients from placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

25.1 ± 14.533.3 ± 14.60.063
Sperm morphology (%)1.8 ± 2.11.9 ± 2.00.663
Sperm head defect (%)95.1 ± 16.297.5 ± 3.30.936
Sperm neck + midpiece defect (%)2.9 ± 16.40.2 ± 0.80.981
Sperm tail defect (%)0.2 ± 0.60.5 ± 1.00.424
Leukocytes with peroxidase (million/ml)0.3 ± 0.30.5 ± 0.80.976
Mitochondrial membrane potential (%)

= the proportion of spermatozoa with normal MMP;

27.5 ± 18.526.9 ± 15.30.888
DNA fragmentation (%)50.5 ± 23.945.8 ± 21.80.424
FSH (IU/l)9.7 ± 7.89.2 ± 5.80.919
Chemicals at work (% exposed)5.414.30.204
Ultraviolet rays at work (% exposed)2.700.327
X-ray at work (% exposed)011.40.051
High temperature at work (% exposed)13.514.30.925
Sedentary job (% exposed)45.940.00.611

Comparison of basic semen parameters, sperm MMP, DNA fragmentation, serum FSH values in astaxanthin and placebo groups after three-month treatment period

ParameterAstaxanthin (n = 37)Placebo (n = 35)
BaselineAfter 3 monthsp-valueBaselineAfter 3 monthsp-value
Sperm concentration (million /ml)

= the analysis for total sperm number and sperm concentration was made for 33/37 patients from the astaxanthin group and 34/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

7.0 ± 5.69.2 ± 7.90.1005.7 ± 5.910.2 ± 15.70.024
Total sperm number (million/ejaculate)

= the analysis for total sperm number and sperm concentration was made for 33/37 patients from the astaxanthin group and 34/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

24.6 ± 28.631.7 ± 33.40.18616.0 ± 21.138.4 ± 69.20.002
Total sperm motility (%)

= the analysis for total and progressive sperm motility was made for 22/37 patients from the astaxanthin group and 16/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

32.3 ± 14.037.9 ± 14.70.17238.0 ± 15.043.1 ± 12.80.164
Progressive sperm motility (%)

= the analysis for total and progressive sperm motility was made for 22/37 patients from the astaxanthin group and 16/35 patients from the placebo group, since the excluded patients only had a few mobile or immobile spermatozoa in the semen sample;

27.3 ± 14.033.0 ± 14.70.17133.1 ± 14.738.1 ± 12.80.176
Sperm morphology (%)1.8 ± 2.11.6 ± 1.40.4711.9 ± 2.02.0 ± 1.70.913
Sperm head defect (%)95.1 ± 16.297.8 ± 2.20.78597.5 ± 3.397.2 ± 2.70.836
Sperm neck + midpiece defect (%)2.9 ± 16.40.2 ± 0.70.9160.2 ± 0.80.3 ± 0.80.472
Sperm tail defect (%)0.2 ± 0.60.4 ± 0.90.2530.5 ± 1.00.5 ± 0.90.872
Leukocytes with peroxidase (million/ml)0.3 ± 0.30.5 ± 0.70.1550.5 ± 0.80.6 ± 0.90.365
Mitochondrial membrane potential (%)

the proportion of spermatozoa with normal sperm mitochondrial membrane potential (MMP);

27.5 ± 18.526.3 ± 18.50.37526.9 ± 15.327.1 ± 15.90.925
DNA fragmentation (%)50.5 ± 23.951.2 ± 17.90.95845.8 ± 21.849.8 ± 16.90.116
FSH IU/l)9.7 ± 7.810.0 ± 8.30.2009.2 ± 5.89.7 ± 6.50.345
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Medicine, Clinical Medicine, Internal Medicine, Haematology, Oncology, Radiology