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Table 3 The fluctuation of sexual activity derived based on data in previous studies. Here, we regard the number of people having sexual contact as sexual activity

From: The effect of men who have sex with men (MSM) on the spread of sexually transmitted infections

Countries and references

Period

Male

Female

Variance

Mean

C

Variance

Mean

C

Britain 1992 [47]

lifetime

6575

9.9

68.1

165

3.4

15.3

Britain 2000 [48]

lifetime

1239

12.7

8.7

94

6.5

3.2

Sweden 1996 [49]

lifetime

1173

14.5

6.6

70

6.7

2.6

Finland 1971 [50]

lifetime

352

11

3.9

16

2.6

3.4

Finland 1992 [50]

lifetime

369

13.8

2.9

67

5.2

3.5

Finland 1999 [50]

lifetime

420

14.4

3.0

88

6.6

3.0

Russia 1996 [50]

lifetime

310

11.5

3.3

31

4.2

2.8

Rakai [51]

last year

1.23

1.28

1.8

0.27

0.89

1.3

Sweden [45]

last year

2.19

1.27

2.4

0.88

1.01

1.9

USA [45]

last year

1.42

1.41

1.7

0.69

1.09

1.6

Japan [28]

lifetime

1785

13.84

10.3

118.5

5.348

5.1

Japan [28]

last 3 months

22.45

0.766

39.3

1.843

0.437

10.7