Fracture pattern and risk factors for reoperation after treatment of 156 periprosthetic fractures around an anatomic cemented hip stem.

Background And Purpose: The Lubinus SP2 stem has been associated with a very low risk of periprosthetic femoral fractures (PPFFs). We aimed, primarily, to study the radiographic morphology of PPFFs close to a Lubinus SP2 stem. Secondarily, we analyzed whether higher reoperation rate was correlated to the revision method chosen or to the characteristics of the fracture and of the bone.

HIV prevalence and risk behaviors of male injection drug users in Cairo, Egypt.

Objective: To measure HIV prevalence and related risk behaviors among male injection drug users (IDUs) in Cairo, Egypt in the context of the first survey wave of an integrated biological and behavioral surveillance system.

Design And Methods: Given the hidden nature of injection drug use, we used the peer-referral methodology of respondent-driven sampling in a cross-sectional study to recruit a sample of male IDUs in Cairo between May and August 2006. Behavioral data were collected through face-to-face interviews and serum was obtained for HIV antibody testing.