Background
Men who have sex with
men (MSM) are at high risk of HIV infection. For developing proper
interventions, it is important to know the size of MSM population. However,
size estimation of MSM populations is still a significant public health
challenge due to high cost, hard to reach and stigma associated with the
population.
Objectives
We aimed to estimate the
social network size (c value) in general population and the
size of MSM population in Shanghai, China by using the net work scale-up
method.
Methods
A multistage random
sampling was used to recruit participants aged from 18 to 60 years who had
lived in Shanghai for at least 6 months. The “known population method” with
adjustment of backward estimation and regression model was applied to estimate
the c value. And the MSM population size was
further estimated using an adjusted c value
taking into account for the transmission effect through social respect level
towards MSM.
Results
A total of 4017
participants were contacted for an interview, and 3907 participants met the
inclusion criterion. The social network size (c value) of participants was 236 after
adjustment. The estimated size of MSM was 36354 (95% CI: 28489–44219) for the
male Shanghaies aged 18 to 60 years, and the proportion of MSM among the total
male population aged 18 to 60 years in Shanghai was 0.28%.
Conclusions
We employed the network
scale-up method and used a wide range of data sources to estimate the size of
MSM population in Shanghai, which is useful for HIV prevention and intervention
among the target population.
Below: Regression model with all the 22 subpopulations of known size
Full article at: http://goo.gl/gWV1t8
By: Jun Wang,#1,2 Ying Yang,#1,2,3 Wan Zhao,3 Hualin Su,3 Yanping Zhao,3 Yue Chen,4 Tao Zhang,1,2,* and Tiejun Zhang1,2,*
1Department of Epidemiology, School of
Public Health, Fudan University, Shanghai, China
2Key Laboratory of Public Health Safety
(Fudan University), Ministry of Education, Shanghai, China
3Minhang district center for diseases
control and prevention, Shanghai, China
4School of Epidemiology, Public Health and
Preventive Medicine, University of Ottawa, Ontario, Canada
Centers for
Disease Control and Prevention, UNITED STATES
More at: https://twitter.com/hiv_insight
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