Univariate regression analysis of factors associated with seroconversion in a cohort of 474 injection drug users followed for two years in Karachi, Pakistan.

a Government organization, non-governmental organization, community, and friends.
b Non-Muslim included 54 Christians and 2 Hindus vs. 418 Muslims.
c Non-Sindhis included Pathan, Punjabi, Hindko, Kashmiri, and Bengali.
≈US$ 56.d Approximately 90 rupees per US dollar in this time period, such that 5000 rupees
e Pharmacy, friends, and hospital garbage.
f Drop-in center and mobile service unit.