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Sampling design and recruitment

Sampling design and recruitment

Each round associated with the IBBSS utilized respondent driven sampling provided to your concealed nature of MSM and therefore enables contrast between and across rounds. Respondent sampling that is drivenRDS) happens to be described at length in past studies 22, 23. Shortly, RDS is a modified chain referral sampling that is non-random of recruitment that adjusts for the non-randomness utilizing a mathematical model that loads each sample recruited 23. Inclusion criteria ended up being male aged 16 years and above with a history of oral and/or anal contact that is sexual another guy within the six months ahead of the study. Known MSM, designated as “seeds” began the chain associated with recommendation community and make use of vouchers to recruit their peers to the research. Ten seeds had been chosen for every circular and seeds had been diversified by age, educational status and status that is socioeconomic. In order to prevent an over-representation of MSM with comparable characteristics, vouchers restricted to three per recruit was utilized 23, 24. In addition, in order to prevent perform enrollment, only 1 screener ended up being utilized, just one individual had been authorized to https://bridesfinder.net/russian-bride/ reimburse MSM that has effectively recruited his peers and just one location ended up being utilized. Each voucher had been yielded and redeemable N500 approx. $3 USD as a motivation for participating, with an extra N500 directed at a recruit for every single effective participant that is additional. Total payment ended up being limited by a compensation that is maximum of approximately $12 USD. Test size when it comes to 2007 IBBSS had been projected centered on an assumed HIV prevalence of 15%, a design aftereffect of 2.0 and degree of accuracy of 0.05.Read More »Sampling design and recruitment

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