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Table 1 Description of conjoint survey attributes and associated level options presented to respondents

From: Preferences for pre-exposure prophylaxis among U.S. military men who have sex with men: results of an adaptive choice based conjoint analysis study

Attributes and levels Survey description
Dosing method
 Daily oral tablet Daily oral tablet means that you would have to take an oral tablet every day (daily) to maintain a protective level of PrEP medication
 PrEP injection PrEP injection means that you get an injection or shot that would provide a protective level of PrEP medication for 2 months
 PrEP implant PrEP implant means that you would get a small implant that would slowly release a protective level of PrEP medication for at least a year
 On-demand regimen On-demand regimen means you take two tablets 24 h before sex and then one tablet daily for the next two days. This dosing method would protect you from HIV for that single sexual encounter only
 PrEP rectal douche Rectal PrEP douche means that you would use a rectal douche or enema prior to having sex that leaves behind protective level of PrEP medication for that sexual encounter
Provider type
 Military Military provider means that you prefer a medical visit with a healthcare provider that is a member of the military
 Civilian Civilian provider means that you prefer a medical visit with a healthcare provider that is a civilian or not a member of the military
PrEP visit location
 Smartphone Smartphone/mobile app visit means that you prefer to have a virtual medical visit with a healthcare provider through a smartphone call or mobile app
 On-base On-base medical visit means that you prefer an in-person medical visit with a healthcare provider that is in a clinic on-base
 Off-base Off-base medical visit means that you prefer an in-person medical visit with a healthcare provider that is in a clinic off-base
Lab evaluation location
 Provide labs on-base Provide lab work on-base means that you prefer to do you lab work at a laboratory or clinic on-base
 Provide labs off-base Provide lab work off-base means that you prefer to do you lab work at a laboratory or clinic off-base
 Home-based mail-in kit Home-based mail-in kit means that you prefer to receive a home-based lab testing kit in the mail. You will provide self-collected, small samples of blood and urine and mail the kit back to the laboratory for evaluation. Your PrEP provider would then see the lab results after processing
PrEP dispensing venue
 Receive PrEP on-base Receive PrEP on-base means that you prefer to pick up or receive your PrEP medication from a pharmacy/clinic on-base
 Receive PrEP off-base Receive PrEP off-base means that you prefer to pick up or receive your PrEP medication from a pharmacy/clinic off-base
 Receive PrEP by mail Receive PrEP by mail delivery means that you prefer to receive your PrEP medication in the mail at your home or APO
  1. PrEP pre-exposure prophylaxis, APO Army Post Office