Skip to main content

Table 1 Prevalence of HIV, syphilis and HCV among Vietnamese and overall FSW (unweighted vs. weighted)

From: Human immunodeficiency virus, syphilis and hepatitis C virus prevalence trends among cross-border migrant Vietnamese female sex workers in Guangxi, China

  

2010 (N = 49)

2011 (N = 110)

2012 (N = 166)

2013 (N = 343)

2014 (N = 358)

Overall (N = 1026)

HIV (%)

VFSW-Unweighted

8.16

5.45

3.61

3.21

1.68

3.22

 

VFSW-Weighted1

5.65

2.95

4.26

3.23

1.53

2.84

 

All-FSW

1.60

1.07

1.11

0.88

0.65

1.00

Syphilis (%)

VFSW-Unweighted

8.16

9.09

9.64

7.87

3.91

6.92

 

VFSW-Weighted1

3.45

6.55

7.13

7.99

3.59

5.92

 

All-FSW

6.10

7.24

7.14

6.28

4.68

6.22

HCV (%)

VFSW-Unweighted

0.00

2.73

2.41

3.50

2.23

2.63

 

VFSW-Weighted1

0.00

1.47

2.51

2.33

2.57

1.67

 

All-FSW

1.00

0.96

1.09

0.95

0.73

0.93

  1. Notes: 1. Direct standardization: using the all FSW’s as the standard population for each stratum of venues to obtain expected number of events, summing the events to obtain total expected events and divided by total standard population to obtain standardized risk. The general formula is: Rw = ∑&# x200B;(wiRi)/∑&# x200B;(wi), where wi is the stratum specific weight of the standard generation; Ri is the stratum specific risk of the study population