Table 1 BBV-TRAQ item categorisations and median key informant ratings

Category 5 (highest risk; median KE ratings 9–10)

a5

In the last month, how many times have you injected a drug which has been filtered through another persons filter

a7

In the last month, how many times have you injected a drug prepared with water that had been used by another person

a8

In the last month, how many times have you injected a drug which had come into contact with another person's used needle and syringe

a13a

In the last month how many times have you injected with another person's used needle and syringe

a13b On those occasions, how often did you rinse it with a combination of full-strength bleach and water (2 × 2) before you used it

a14

In the last month how many times have you injected with a needle and syringe after another person has already injected some of its contents.

a19

In the last month, how many times have you received an accidental needle-stick from another person's used needle and syringe

a20a

In the last month, how many times have you reused a needle and syringe taken out of a shared sharps container

a20b On those occasions, how often did you rinse it with a combination of full-strength bleach before you re-used it

c2

In the last month, how many times have you been tattooed by someone who was not a professional tattooist

c3

In the last month, how many times have you been pierced by someone who was not a professional piercer

Category 4 (median KE ratings 7–8)

a6a

In the last month, how many times have you injected a drug that was prepared in another persons used spoon or mixing container

a6b On those occasions how often did you clean the spoon or mixing container before using it

a9a

In the last month, how many times have you injected a drug prepared immediately after assisting another person with their injection (injecting them, holding their arm, handling used fits, wipe blood away etc)

a9b On those occasions, how often did you wash your hands before preparing your mix

a10a

In the last month, how many times have you injected a drug that was prepared by another person who had already injected or assisted someone else to inject

a10b On those occasions, how often did the person wash your hands before preparing your mix

a11a

In the last month, how many times have you been injected by another person who had already injected or assisted in someone else's injection

a11b On those occasions, how often did the person injecting you wash your hands before injecting you

a12a

In the last month, how many times have you been injected with a needle and syringe which had been handled or touched by another person who had already injected

a12b On those occasions, how often did they wash their hands prior to handling the needle and syringe that you used

a15a

In the last month, how many times have you touched your own injection site soon after 'assisting' another person with their injection

a15b On those occasions, how often did you wash your hands before touching your injection site

a16a

In the last month, how many times has another person touched your injection site

a16b On those occasions, how often did they wash their hands before touching your injection site

a17

In the last month, how many times have you wiped your own injection site with an object (swab, tissue, hanky) which had been used by another person

c4

In the last month, how many times have you used another person's used razor

Category 3 (median KE ratings 5–6)

a1

In the last month, how many times handled another persons syringe at a time when you had cuts etc

a18

In the last month, how many times have you used a tourniquet which had been used by another person

b2

In the last month, how many times have you engaged in unprotected vaginal sex with another person during menstruation

c1

In the last month, how many times have you come in contact with another person's blood (fights, slash-ups, accidents, blood nose etc)

Category 2 (median KE ratings 3–4)

a2

In the last month, how many times have you sucked or licked left-over drugs from spoon, mixing container used by another person

a3

In the last month, how many times have you sucked or licked a filter used by another person

a4

In the last month, how many times have you sucked or licked a plunger after using it in a mix used by another person

b3

In the last month, how many times have you engaged in unprotected vaginal sex with another person without lubrication

b4

In the last month, how many times have you engaged in unprotected anal sex with another person

c5

In the last month, how many times have you used another person's toothbrush

c6

In the last month, how many times have you used another person's personal hygiene equipment (nail file, nail scissors, brush etc)

Category 1 (lowest risk; median KE ratings 1–2)

b1

In the last month, how many times have you engaged in unprotected vaginal sex with another person

b5

In the last month, how many times have you engaged in unprotected oral sex with another person

b6

In the last month, how many times have you engaged in unprotected manual sex with another person during menstruation

b7

In the last month, how many times have you engaged in unprotected manual sex with another person after injecting

b8

In the last month, how many times have you engaged in unprotected manual sex with another person without lubrication