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Table 3 Annual probability of acquiring and transmitting HIV for men having sex with men who sell sex and who do not sell sex and for women who sell sex

From: How much attention is needed towards men who sell sex to men for HIV prevention in India?

Men who sell sex to men (N = 1776)

Variable*

For acquiring HIV through sex with men

For transmitting HIV through sex with women

For transmitting HIV through sex with men who do not sell sex

 

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive vaginal sex

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive anal sex

Receptive oral sex

P

0.13

0.13

0.16

0.24

0.24

0.24

0.24

0.24

0.24

R

0.015

0.0004

0.001

0.0015

0.015

0.0004

0.001

0.015

0.0004

F

0.53

0.35

0.53

0.11

0.33

0.13

0.53

0.53

0.12

E

0.70

0.90

0.70

0.80

0.70

0.90

0.70

0.70

0.90

N

3.09

1.59

3.09

29.69

29.69

29.69

3.09

3.09

3.31

M

55.81

19.86

4.97

1.02

0.03

0.07

54.30

3.46

1.42

I

0.24

0.24

0.24

0.04

0.04

0.04

0.12

0.12

0.12

Annual probability per 1000

143.86

0.85

1.17

9.34

2.09

0.17

22.00

20.94

0.35

Total

146

12

43

Men who sell sex to men frequently (N = 1098)

Variable*

For acquiring HIV through sex with men

For transmitting HIV through sex with women

For transmitting HIV through sex with men who do not sell sex

 

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive vaginal sex

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive anal sex

Receptive oral sex

P

0.13

0.13

0.16

0.25

0.25

0.25

0.25

0.25

0.25

R

0.015

0.0004

0.001

0.0015

0.015

0.0004

0.001

0.015

0.0004

F

0.57

0.38

0.57

0.122

0.40

0.222

0.57

0.57

0.12

E

0.70

0.90

0.70

0.80

0.70

0.90

0.70

0.70

0.90

N

2.85

1.56

2.85

29.14

29.14

29.14

2.85

2.85

3.31

M

76.89

27.02

4.34

0.74

0.02

0.03

75.50

2.95

1.21

I

0.25

0.25

0.25

0.04

0.04

0.04

0.12

0.12

0.12

Annual probability per 1000

168.87

1.08

0.89

6.88

1.35

0.07

27.98

16.42

0.31

Total

171

8

45

Men who sell sex to men infrequently (N = 678)

Variable*

For acquiring HIV through sex with men

For transmitting HIV through sex with women

For transmitting HIV through sex with men who do not sell sex

 

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive vaginal sex

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive anal sex

Receptive oral sex

P

0.13

0.13

0.16

0.22

0.22

0.22

0.22

0.22

0.22

R

0.015

0.0004

0.001

0.0015

0.015

0.0004

0.001

0.015

0.0004

F

0.47

0.27

0.47

0.10

0.30

0.09

0.47

0.47

0.12

E

0.70

0.90

0.70

0.80

0.70

0.90

0.70

0.70

0.90

N

4.00

1.94

4.00

30.00

30.00

30.00

4.00

4.00

3.31

M

23.07

8.92

5.22

1.48

0.05

0.13

21.57

3.72

1.52

I

0.22

0.22

0.22

0.04

0.04

0.04

0.12

0.12

0.12

Annual probability per 1000

87.68

0.53

1.75

12.61

3.28

0.30

11.13

28.24

0.35

Total

90

16

40

Men who have sex with men but do not sell sex (N = 4885)

Variable*

For acquiring HIV through sex with men

For transmitting HIV through sex with women

For transmitting HIV through sex with men who sell sex

 

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive vaginal sex

Receptive anal sex

Receptive oral sex

Insertive anal sex

Receptive anal sex

Receptive oral sex

P

0.16

0.16

0.18

0.12

0.12

0.12

0.12

0.12

0.12

R

0.015

0.0004

0.001

0.0015

0.015

0.0004

0.001

0.015

0.0004

F

0.51

0.12

0.51

0.16

0.22

0.10

0.57

0.53

0.35

E

0.70

0.90

0.70

0.80

0.70

0.90

0.70

0.70

0.90

N

3.89

3.31

3.89

34.09

34.09

34.09

2.85

3.09

1.59

M

10.64

4.35

13.13

2.26

0.05

0.05

2.95

2.27

0.81

I

0.12

0.12

0.12

0.04

0.04

0.04

0.24

0.24

0.24

Annual probability per 1000

53.87

1.24

5.18

11.31

2.08

0.07

0.46

5.97

0.03

Total

60

13

6

Women who sell sex (N = 6648)

Variable*

For acquiring HIV through sex with men

For transmitting HIV through sex with men

    
 

Receptive vaginal sex

Receptive anal sex

Receptive oral sex

Insertive vaginal sex

Insertive anal sex

    

P

0.08

0.08

0.08

0.16

0.16

    

R

0.0015

0.015

0.0004

0.0007

0.001

    

F

0.63

0.59

0

0.63

0.59

    

E

0.80

0.70

0.90

0.80

0.70

    

N

2.51

2.51

2.51

2.51

2.51

    

M

171.78

0.17

0.43

171.78

0.17

    

I

0.16

0.16

0.16

0.08

0.08

    

Annual probability per 1000

21.27

0.25

0.03

21.77

0.04

    

Total

22

22

    
  1. *P is average HIV prevalence among sex partners of the group for which the probability is being estimated; R is risk of HIV transmission per act of unprotected sex; F is fraction of sex acts in which condom was used; E is effectiveness of condoms; N is average number of sex acts per partner in a year; M is average number of sex partners in a year; I is proportion of the susceptible group that is already infected with HIV.
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