Variables

Frequency of ejaculation

Sperm donors

Sub-fertile men

Pearson’s

R

P-value

Pearson’s

R

P-value

Age group

0.084

0.731

−0.18

0.04

BMI group

−0.226

0.352

0.027

0.80

Systolic blood pressure (mmHg)

0.063

0.798

−0.08

0.46

Diastolic blood pressure (mmHg)

0.256

0.290

0.03

0. 74

Type of infertility

-

-

−0.119

0.25

Ever fathered a child

-

-

0.199

0.05

Miscarriage in partner

-

-

−0.007

0.94

Use of Herbal medicinal tea

−0.004

0.985

0.059

0.57

Alcohol consumption

−0.422

0.072

0.052

0.62

Number of cigarettes smoked daily

0.247

0.307

−0.041

0.70

DNA fragmentation index

0.175

0.475

−0.076

0.46