1. Quality Assessment Table.

Study Author	Study Design	Age	Sex	Route of HIV transmi	Race	Case‐Mix	Insurance Status	Final assessment
Aiken 99	Prospective Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Bennett 92	Retro Cohort	Yes	Yes	No	Yes	Yes	Yes	5/6
Bennett 95	Retro Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Bennett 96a	Retro Cohort	No	No	No	No	Yes	No	1/6
Bennett 96b	Retro Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Chan 02	Cohort	Yes	Yes	Yes	Yes	No	Yes	5/6
Curtis 97	Retro Cohort	No	Yes	Yes	Yes	Yes	No	4/6
Holzemer 92	Pros Rec Rev	No	Yes	No	No	No	No	1/6
Horner 95	Retro Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Katz 01	Pros Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Keitz 01	RCT	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Laine 98	Retro Cohort	Yes	Yes	Yes	No	Yes	Yes	5/6
Laine 99	Retro Cohort	Yes	Yes	Yes	No	Yes	Yes	5/6
Laraque 96	Retro Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Le 98	F/u Cohort	Yes	No	Yes	Yes	Yes	Yes	5/6
Markson 98	Retro Cohort	Yes	Yes	Yes	No	No	Yes	4/6
Messeri 02	Prosp Cohort	No	Yes	No	Yes	Yes	No	3/6
Newschaf98a	Retro Cohort	Yes	Yes	No	Yes	Yes	Yes	5/6
Newschaf98b	Retro Cohort	Yes	Yes	No	No	Yes	Yes	4/6
Newschaf99	Retro Cohort	Yes	Yes	No	Yes	Yes	Yes	5/6
Safran 95	CCT	?	Yes	No	Yes	Yes	No	3/6
Smith 96	Prosp Cohort	Yes	Yes	Yes	Yes	Yes	Yes	6/6
Stone 92	Retro Cohort	No	Yes	Yes	Yes	Yes	Yes	5/6
Turner 01	Retro Cohort	Yes	Yes	No	Yes	Yes	Yes	5/6
Turner 92	Retro Cohort	Yes	Yes	No	Yes	Yes	No	4/6
Turner 98	Retro Cohort	Yes	Yes	Yes	No	No	Yes	4/6
Turner 99	Retro Cohort	Yes	Yes	No	Yes	Yes	Yes	5/6
Turner 00	Retro Cohort	Yes	Yes	Yes	No	Yes	Yes	5/6