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Table 5 Comparisons of serum reproductive hormone, lipids and leptin levels based on the dichotomized analyses for BMI, WC, WHR and WHtR

From: Association between obesity-associated markers and semen quality parameters and serum reproductive hormones in Chinese infertile men

Variable

WHO BMI category

WC (cm)

WHR

WHtR

Underweight (N = 4)

Normal (N = 103)

Overweight (N = 54)

Obese (N = 20)

<  90 (N = 95)

≥ 90 (N = 86)

P value

< 0.9 (N = 76)

≥0.9 (N = 105)

P value

< 0.5 (N = 70)

≥0.5 (N = 111)

P value

Semen volume (mL)

2.53 ± 0.33a

2.35 ± 0.56

2.42 ± 0.69

2.16 ± 0.66

2.40 ± 0.52

2.30 ± 0.70

0.290

2.34 ± 0.55

2.37 ± 0.65

0.797

2.40 ± 0.53

2.33 ± 0.66

0.797

Ratio of PR sperm (%)

21.15 ± 6.55a

39.44 ± 18.50

33.47 ± 18.33* a

37.30 ± 22.60 a

39.09 ± 18.18

34.73 ± 19.64

0.124

40.22 ± 18.01

34.70 ± 19.29

0.050a

39.05 ± 18.41

35.74 ± 19.28

0.226a

Ratio of PR + NP sperm (%)

41.15 ± 8.97*a

59.37 ± 19.46

51.68 ± 20.39* a

59.52 ± 21.72 a

59.23 ± 19.19

53.88 ± 20.91

0.063 a

59.73 ± 18.24

54.49 ± 21.14

0.092a

59.25 ± 18.73

55.08 ± 20.92

0.159 a

Sperm concentration (106/ml)

67.13 ± 38.59a

50.91 ± 27.31

39.81 ± 23.97**

49.73 ± 35.41

52.22 ± 27.72

42.97 ± 27.61

0.026

51.49 ± 23.79

45.17 ± 30.34

0.119

52.07 ± 27.52

45.15 ± 28.05

0.104

Ratio of morphologically normal sperm (%)

4.05 ± 1.34a

3.86 ± 2.01

2.944 ± 1.44***

3.32 ± 2.14 a

3.38 ± 1.64

3.71 ± 2.14

0.248

3.43 ± 1.73

3.61 ± 2.00

0.510

3.24 ± 1.68

3.72 ± 2.01

0.087

FSH

3.98 ± 1.53a

4.33 ± 2.11

4.86 ± 2.40

4.76 ± 2.00 a

4.47 ± 2.38

4.59 ± 1.95

0.730

4.40 ± 2.32

4.62 ± 2.07

0.508

4.34 ± 2.43

4.65 ± 2.01

0.376

LH

3.13 ± 1.22 a

3.46 ± 1.74

3.28 ± 1.53

3.30 ± 1.05 a

3.39 ± 1.61

3.37 ± 1.60

0.960

3.40 ± 1.63

3.36 ± 1.57

0.872

3.26 ± 1.46

3.45 ± 1.68

0.415

P

0.69 ± 0.18 a

0.68 ± 0.34

0.57 ± 0.26* a

0.63 ± 0.26 a

0.65 ± 0.30

0.63 ± 0.33

0.445a

0.65 ± 0.28

0.64 ± 0.33

0.816

0.64 ± 0.30

0.64 ± 0.32

0.978

E2

33.75 ± 10.69 a

34.52 ± 12.91

38.22 ± 13.90 a

46.5 ± 13.03**** a

36.56 ± 13.53

37.34 ± 13.78

0.853a

37.46 ± 13.48

36.55 ± 13.70

0.657

38.34 ± 13.68

36.04 ± 13.57

0.271

PRL

10.52 ± 3.66 a

9.63 ± 4.80

8.85 ± 3.52 a

8.72 ± 2.30 a

9.15 ± 3.76

9.49 ± 4.66

0.593

8.97 ± 3.37

9.56 ± 4.70

0.329

8.92 ± 3.48

9.56 ± 4.61

0.293

TT

5.32 ± 2.47 a

3.84 ± 1.01

3.442 ± 0.93* a

2.98 ± 0.98**** a

3.64 ± 1.00

3.68 ± 1.19

0.794

3.68 ± 1.18

3.65 ± 1.02

0.945a

3.63 ± 1.01

3.68 ± 1.15

0.749

E2/TT

7.21 ± 3.55 a

9.71 ± 4.72

12.26 ± 7.04*

16.64 ± 5.94**** a

11.04 ± 6.14

11.34 ± 5.94

0.742

11.41 ± 6.60

11.01 ± 5.59

0.666

11.70 ± 6.62

10.85 ± 5.64

0.378

Serum Leptin (μg/L)

11.55 ± 1.14 a

12.62 ± 2.10

14.89 ± 1.94**** a

14.35 ± 2.27*** a

13.45 ± 3.39

13.47 ± 2.24

0.889a

13.24 ± 2.41

13.62 ± 2.23

0.326a

13.48 ± 2.44

13.45 ± 2.24

0.837a

Seminal Leptin (μg/L)

12.85 ± 1.60 a

13.04 ± 2.18

15.71 ± 2.07**** a

14.44 ± 2.66* a

13.87 ± 2.57

14.12 ± 2.41

0.487

13.81 ± 2.56

14.12 ± 2.44

0.423

13.99 ± 2.65

13.99 ± 2.40

0.964a

Seminal SOD (pg/ml)

214.77 ± 51.38 a

207.0 ± 36.91

214.9 ± 41.06

218.7 ± 38.27 a

209.31 ± 38.72

212.55 ± 38.55

0.573

211.49 ± 38.27

210.40 ± 38.77

0.848

211.36 ± 36.86

210.53 ± 39.77

0.903

TC (mmol/L)

4.28 ± 0.59 a

4.53 ± 0.83

5.33 ± 1.17**** a

5.76 ± 1.18**** a

4.86 ± 0.97

4.94 ± 1.20

0.615

4.82 ± 0.98

4.96 ± 1.15

0.408

4.84 ± 1.01

4.94 ± 1.13

0.574

LDL-C (mmol/L)

2.44 ± 0.70

2.55 ± 0.66

3.042 ± 0.98*** a

3.90 ± 1.25****

2.85 ± 0.93

2.84 ± 0.96

0.951

2.79 ± 0.91

2.88 ± 0.96

0.502

2.82 ± 0.91

2.86 ± 0.96

0.824

HDL-C (mmol/L)

1.43 ± 0.09* a

1.15 ± 0.23

1.13 ± 0.27*** a

0.88 ± 0.37 a

1.13 ± 0.32

1.11 ± 0.22

0.389a

1.13 ± 0.33

1.11 ± 0.23

0.761a

1.14 ± 0.31

1.11 ± 0.25

0.318a

TG (mmol/L)

0.89 ± 0.32** a

1.96 ± 1.38

2.91 ± 1.44****

3.00 ± 1.36**** a

2.30 ± 1.65

2.38 ± 1.25

0.708

2.28 ± 1.72

2.38 ± 1.27

0.679

2.15 ± 1.16

2.45 ± 1.63

0.147

  1. * p < 0.05; ** p < 0.01; *** p < 0.005; **** p < 0.0001; a Wilcoxon rank-sum test