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Table 1 Demographic characteristics of the study participants (N = 1780)

From: The association between ambient temperature and sperm quality in Wuhan, China

Characteristics

N (%)

Mean ± SD

Sperm concentration (mln/ml)

Percentage of normal sperm morphology (%)

Progressive motility (%)

Body mass index (kg/m2)

  < 18.5

73(4.1)

79.3 ± 49.1

19.5 ± 17.7

28.1 ± 14.2

 18.5 ~ 25

1146(64.4)

77.0 ± 52.1

20.9 ± 20.0

29.4 ± 16.7

  > 25

561(31.5)

74.6 ± 46.2

20.5 ± 19.9

30.1 ± 16.1

Age (years)

  < 30

363(20.4)

76.3 ± 57.9

19.1 ± 19.2

30.4 ± 16.1

 30–34

759(42.6)

76.53 ± 49.4

20.4 ± 19.4

30.1 ± 16.8

 35–39

444(24.9)

75.0 ± 47.2

21.3 ± 20.2

28.3 ± 16.1

  ≥ 40

214(12.1)

78.2 ± 44.3

23.1 ± 21.9

28.5 ± 15.8

Education

 Less than secondary education

498(28.0)

73.7 ± 49.8

19.8 ± 19.2

29.2 ± 16.7

 Secondary education

686(38.5)

76.5 ± 47.6

21.7 ± 20.3

29.0 ± 15.8

 College and higher

596(33.5)

78.2 ± 53.1

20.2 ± 19.8

30.4 ± 16.6

Smoking

 Non-smokers

1129(63.4)

77.6 ± 51.2

20.7 ± 19.9

29.9 ± 16.6

 Smokers

651(36.6)

74.0 ± 48.1

20.6 ± 19.9

28.8 ± 15.9

Season

 Spring

530(29.8)

70.4 ± 43.3

27.3 ± 24.2

29.2 ± 15.1

 Summer

487(27.4)

74.4 ± 47.9

19.0 ± 18.4

29.6 ± 17.1

 Autumn

448(25.1)

82.6 ± 59.3

14.4 ± 12.2

29.2 ± 16.2

 Winter

315(17.7)

80.1 ± 48.7

20.9 ± 19.6

30.4 ± 17.4

Days abstaining (days)

 2 ~ 3

307(17.2)

74.79 ± 47.32

17.38 ± 16.86

29.99 ± 16.84

 4 ~ 5

1009(56.7)

75.57 ± 53.17

19.65 ± 18.96

28.77 ± 16.38

 6 ~ 7

464(26.1)

78.95 ± 45.03

25.19 ± 22.91

30.95 ± 16.04