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Table 1 Comparison of age and education level of MSM who use nitrite inhalants and of MSM who do not use nitrite inhalants in China

From: Association of nitrite inhalants use and unprotected anal intercourse and HIV/syphilis infection among MSM in China: a systematic review and meta-analysis

Study

Age

Education

Age category (years)

Nitrite inhalants users

N(%)a

Nitrite inhalants nonusers

N(%)a

Education level

Nitrite inhalants users

N(%)a

Nitrite inhalants nonusers

N(%)a

Chen et al. (2016) [24]

16–20

9 (7.4)

92 (13.1)*

Senior high school and below

4 (3.3)

29 (4.1)

21–25

61 (50.0)

389 (55.3)

College/Bachelors

79 (64.8)

457 (65.0)

26–30

52 (42.6)

222 (31.6)

Masters or PhD

39 (32.0)

217 (30.9)

Chu (2013) [17]

≤30

99 (82.5)

317 (62.8)*

Senior high school and below

64 (53.3)

326 (64.6)*

> 30

21 (17.5)

188 (37.2)

College/Bachelors and above

56 (46.7)

179 (35.4)

Li (2014) [19]

≤28

417 (66.1)

1070 (49.2)*

Senior high school and below

276 (43.7)

1055 (48.5)*

> 28

214 (33.9)

1105 (50.8)

College/Bachelors and above

355 (56.3)

1120 (51.5)

Li et al. (2014) [25]

< 25

49 (25.9)

33 (15.6)*

≤12 years education experience

49 (25.9)

93 (44.1)*

≥25

140 (74.1)

178 (84.4)

> 12 years education experience

140 (74.1)

118 (55.9)

Wang et al. (2017) [26]

18–30

109 (71.7)

193 (53.9)*

Less than college

53 (34.9)

200 (55.9)*

31–70

43 (28.3)

165 (46.1)

College and above

99 (65.1)

158 (44.1)

Xu et al. (2017) [27]

< 25

103 (41.9)

309 (38.9)*

Less than college

54 (22.0)

234 (29.5)*

25–49

139 (56.5)

441 (55.5)

College and above

192 (78.0)

560 (70.5)

≥50

4 (1.6)

44 (5.5)

   

Zhang et al. (2016)b [28]

18–34

831 (86.6)

2007 (76.5)*

Senior high school and below

191 (19.9)

818 (31.1)*

35–75

129 (13.4)

618 (23.5)

College/Bachelors and above

770 (80.1)

1809 (68.9)

Zhao et al. (2017) [29]

< 20

36 (11.9)

170 (15.2)

Senior high school and below

66 (21.8)

303 (27.0)

20–29

203 (67.0)

695 (62.0)

College/Bachelors

219 (72.3)

750 (66.9)

≥30

64 (21.1)

256 (22.8)

Masters or PhD

18 (5.9)

68 (6.1)

  1. a Percentages may not add up to 100 because of rounding
  2. b This study has missing data for either age or educational level
  3. Ten studies did not include any information on the age or on the education level of MSM who use nitrite inhalants and of MSM who do not use nitrite inhalants and thus were not included in this table
  4. The comparison of the distribution of age or the distribution of education level between MSM who use nitrite inhalants and MSM who do not use nitrite inhalants were included in this table if the comparison was available in the study. Comparisons used the chi-squared test, and a P-value of less than 0.05 was defined as significant and marked with *
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BMC Public Health

ISSN: 1471-2458

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