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Table 1 Main characteristics of study participants

From: The impact of FSH receptor polymorphism on time-to-pregnancy: a cross-sectional single-centre study

Criteria

FSHR genetic variant

Asn/Asn

Asn/Ser

Ser/Ser

n

% or Median

(25–75% CI)

n

% or Median

(25–75% CI)

n

% or Median

(25–75% CI)

Participants

101

34.7

148

50.9

42

14.4

Mean age (years)

27.4 ± 5.9

27.2 ± 5.5

27.9 ± 5.0

Median body mass index (kg/m2)

21.4 (19.8–24.1)

22.3 (20.0–24.1)

21.5

(20.1–23.1)

Median TTP (month)

1.0 (1.0–4.0)*

1.0 (1.0–3.8)*

7.0

(1.0–15.3)

TTP < 12 month

92

91.1*

133

89.9*

27

64.3

TTP ≥ 12 month

9

8.9

15

10.1

15

35.7

Nuliparous

48

47.5

75

50.7

25

59.5

Multiparous

53

52.5

73

49.3

17

40.5

Living in the city

76

75.3

115

77.7

35

83.3

Living in the country

25

24.7

33

22.3

7

16.7

Education lower than college

37

36.6

63

42.6

14

33.3

College education and higher

64

63.4

85

57.4

28

66.7

Salary < 560 Euro/month

34

33.7

36

24.3

11

26.2

Salary ≥560 Euros/month

67

66.3

112

75.7

31

73.8

Smoking

28

27.7

28

18.9

6

14.3

Alcohol consumers

51

50.5

74

50.0

20

47.6

Coffee consumption

27

26.7*

37

25.0*

32

76.2

Folic acid use

24

23.8

36

24.3

11

26.2

Use of other food additives

32

31.7

50

33.8

14

33.3

Physical activity/sports

28

27.7

48

32.4

16

38.1

Prior hormonal

contraception use

26

25.7

31

20.9

10

23.8

Regular menstrual cycle

68

67.3*

113

76.4*

17

40.5

Irregular menstrual cycle

33

32.7*

35

23.6*

25

59.5

Sexual intercourse one

time/week

18

17.8

27

18.2

7

16.7

Sexual intercourse 2 times and more/week

83

82.2

121

81.8

35

83.3

Past fertility problems

8

7.9

6

4.0

3

7.1

Gynaecological diseases in the past

3

3.0

4

2.7

1

2.4

Working status

93

92.1

141

95.3

39

92.9

Stress

60

59.4

55

37.2

21

50.0

Use of pesticides

2

1.9

1

0.7

1

2.4

  1. n – number of study participants; *p < 0.05 compared with the Ser/Ser group. For quantitative variables p value by non-parametric ANOVA (Kruskal Wallis), for qualitative variables p value by χ2 test