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Table 1 Characteristics of Study Participants (355 studies)

From: The prevalence of HIV among MSM in China: a large-scale systematic analysis

Variable

Number of studies

n or n/N

Percentage

Age (years.)

 <20

93

8856/102,298

4.6% [3.8%; 7.3%]

 20-29

86

43.354/80,249

55.3% [52.9%; 57.6%]

 30-39

85

19,141/73,768

24.7% [23.5%; 25.9%]

 40-49

41

3643/34,063

10.2% [9.0%; 11.4%]

 50+

39

1584/42,046

3.2% [2.6%; 4.1%]

Sample size

 <100

15

1130

0.2%

 101-200

41

6372

1.1%

 201-500

138

49,243

0.8%

 501-1000

63

45,714

8.0%

 1001-2000

58

83,815

14.7%

 2001-5000

25

76,743

13.4%

 5001-10,000

9

63,424

11.1%

 >10,001

6

244,887

42.9%

Marital status

 Single

249

183,832/267,519

68.7% [65.3%; 73.6%]

 Cohabitating

98

3508/129,646

2.7% [2.1%; 3.1%]

 Married

193

153,060/335,726

22.3% [19.8%; 25.0%]

 Divorced or widowed

195

11,126/224,119

5.0% [4.2%; 5.3%]

Current level of education

 Illiterate

38

316/34,779

0.8% [0.6%; 1.3%]

 Primary school

74

1371/42,411

3.21% [2.7%; 3.8%]

 Junior high school

117

17,979/95,030

19.1% [17.8%; 20.5%]

 Senior high school

212

84,723/245,166

34.4% [33.5%; 35.5%]

 College or above

250

180,806/418,465

43.2% [42.7%; 45.2%]

Sexual orientation

 Homosexual

143

53,653/92,721

58.9% [57.3%; 60.4%]

 Bisexual

116

23,117/65,545

33.8% [32.1%; 35.6%]

 Heterosexual

85

2370/47,974

2.8% [2.1%; 3.7%]

 Undetermined

71

2063/38,423

5.7% [4.9%; 6.7%]

Main location to seek homosexual partners

 Internet

101

112,979/316,944

35.6% [32.3%; 39.9%]

 Parks

85

17,547/141,598

12.4% [10.9%;14.3%]

 Public bathhouses/saunas

98

40,029/303,129

13.2% [12.4%; 14.5%]

 Bar/night club/tearoom

100

42,978/165,416

25.9% [22.4%; 27.0%]

Sampling methods

 Respondent driven sampling (RDS)

39

28,952

5.0%

 Snowball

123

271,041

47.0%

 Time-venue

82

95,268

16.3%

 Convenience

11

6828

1.2%

 Multiple methods

39

121,732

20.2%

 Other or not defined

61

58,895

10.3%

Condom use (in the last 6 months)

 During sex with men

  Always

163

113,092/280,617

41.5% [40.1%; 42.8%]

  Sometimes

119

46,927/90,253

48.3% [46.7%; 50.0%]

  Never

101

7890/86,014

10.1% [9.0%; 11.4%]

 During commercial sex with men

  Always

63

8622/19,537

52.1% [48.2%; 56.0%]

  Sometimes

33

1274/3549

33.6% [29.5%; 38.0%]

  Never

33

294/3533

9.0% [6.0%; 13.4%]

 When purchasing sex

  Always

9

282/623

50.4% [39.3%; 61.6%]

  Sometimes

5

190/487

34.0% [25.7%; 43.3%]

  Never

5

69/487

14.3% [10.1%; 19.7%]

 During anal sex with men when selling sex

  Always

10

538/913

60.7% [52.2%; 68.7%]

  Sometimes

5

234/669

31.2% [22.8%; 40.9%]

  Never

5

62/669

10.7% [6.3%; 17.5%]

 During sex with a woman

  Always

108

16,282/61,944

29.6% [28.1%; 31.1%]

  Sometimes

68

5396/16,474

34.3% [31.4%; 37.3%]

  Never

68

5937/17,665

34.2% [31.2%; 37.4%]

Occupation

 Student

81

8592/56,128

16.3% [14.3%; 18.5%]

 Teacher

20

150/5460

3.0% [2.4%; 3.8%]

 Office staff

51

8946/39,117

13.9% [11.4%; 16.7%]

 Farmer

22

833/19,603

4.2% [2.4%; 7.4%]

 Service business employee

63

14,358/51,468

25.7% [22.8%;28.9%]

 Jobless or job-seeking

26

1558/15,119

9.2% [6.7%; 12.5%]

 Worker

46

4793/36,243

13.0% [11.3%; 14.9%]

 Retired

7

41/2591

1.9% [0.8%; 4.3%]

 Food and beverage service personnel

20

573/8375

6.0% [4.3%; 8.5%]

Sexual debut partner

 Male

54

23,608/38,680

60.2% [57.8%; 62.6%]

 Female

54

14,547/38,680

38.0% [35.5%; 40.5%]

HIV/AIDS-related knowledge

 Awareness rate of HIV/AIDS knowledge

104

225,951/254,330

91.1% [89.5%; 92.4%]

 HIV can be transmitted through the blood or blood products

70

29,812/31,420

95.7% [94.6%; 96.5%]

 HIV can be sexually transmitted

73

28,601/30,682

97.6% [95.7%; 98.7%]

 HIV can spread through mosquito or other insect bites

62

20,718/28,888

74.2% [70.7%; 77.4%]

 People who look healthy can still have HIV

61

20,801/27,084

82.2% [78.5%; 85.4%]

 A pregnant woman with HIV can transmit the virus to her baby

70

26,869/29,382

92.8% [91.0%; 94.3%]

 Sharing needles for drug use with someone who has

58

24,262/25,621

95.7% [94.5%; 96.6%]

 HIV or AIDS could cause HIV infection

63

24,072/29,093

87.1% [84.3%; 89.4%]

Drug use

 Drug use

83

1044/59,764

1.5% [1.1%; 2.0%]

 No drug use

20

16,783/17,268

97.6% [95.7%; 98.7%]

  1. Figures in parentheses are 95% CIs; n, number of MSM in the subgroup; N, total number investigated in the subgroup.