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Stratified meta-analyses
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Study Characteristic
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HIV prevalence
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HCV prevalence
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HIV-HCV co-infection prevalence
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Pooled estimate
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Meta-regression
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Pooled estimate
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Meta-regression
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Pooled estimate
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Meta-regression
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% (95% CI), n
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(β , p-value)
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% (95% CI), n
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(β , p-value)
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% (95% CI), n
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(β , p-value)
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Language of article:
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Chinese
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6.0 (4.7-7.6), n = 70
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0.060
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60.1 (52.6-67.2), n = 69
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0.018
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4.2 (2.5-6.8), n = 18
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0.402
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English
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8.4 (2.7-23.0), n = 2
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p = 0.956
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57.9 (35.9-77.1), n = 2
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p = 0.964
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13.5 (10.9-16.6), n = 1
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p = 0.823
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Sample size:
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<500
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4.8 (3.4-6.7), n = 50
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0.178
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59.8 (54.6-64.9), n = 53
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-0.189
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2.2 (1.2-4.1), n = 11
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1.367
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≥500
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8.2 (5.6-11.8), n = 22
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p = 0.561
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60.3 (42.3-75.8), n = 18
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p = 0.191
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9.8 (5.7-16.2), n = 8
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p = 0.029
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Study locations*:
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HTA
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17.5 (14.0-21.6), n = 27
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-1.811
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70.2 (62.6-76.8), n = 21
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-0.335
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8.0 (4.8-12.9), n = 10
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-0.831
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LTA
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2.4 (1.6-3.5), n = 45
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p < 0.001
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55.5 (46.4-64.2), n = 50
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p = 0.017
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2.5 (1.4-4.4), n = 9
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p = 0.139
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Sampling method:
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Cross-sectional
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5.7 (4.3-7.4), n = 580
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0.148
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62.4 (54.2-69.9), n = 60
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-0.275
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4.6 (2.9-7.2), n = 19
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-
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Others
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8.3 (5.1-13.2), n = 14
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p = 0.686
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46.2 (36.3-56.5), n = 11
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p = 0.112
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-
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-
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Time period:
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2004–2006
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8.0 (5.2-12.2), n = 16
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-0.268
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56.7 (47.0-65.8), n = 13
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0.026
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4.5 (0.3-40.4), n = 2
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0.353
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2007–2010
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5.5 (4.1-7.3), n = 56
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p = 0.458
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60.9 (52.1-69.0), n = 58
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p = 0.879
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4.4 (2.7-7.2), n = 17
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p = 0.803
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- Table showing the pool estimate (%), 95% confidence interval (CI), number of studies (n), meta-regression coefficient (β) and significance of β (p-value). p-values in bold print represent significant associations (p < 0.10).
- * Study locations were categorized into two regions. HTA (high HIV transmission areas among DUs): Yunnan, Guizhou, Sichuan, Guangxi and Xinjiang; LTA (low HIV transmission areas among DUs): all provinces except above in Chinese mainland.
