A Prediction Model to Help with the Assessment of Adenopathy in Lung Cancer: HAL.

RATIONALE: Estimating the probability of finding N2 or N3 (prN2/3) malignant nodal disease on endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in patients with non-small cell lung cancer (NSCLC) can facilitate the selection of subsequent management strategies. OBJECTIVES: To develop a clinical prediction model for estimating the prN2/3. METHODS: We used the AQuIRE (American College of Chest Physicians Quality Improvement Registry, Evaluation, and Education) registry to identify patients with NSCLC with clinical radiographic stage T1-3, N0-3, M0 disease that had EBUS-TBNA for staging. The dependent variable was the presence of N2 or N3 disease (vs. N0 or N1) as assessed by EBUS-TBNA. Univariate followed by multivariable logistic regression analysis was used to develop a parsimonious clinical prediction model to estimate prN2/3. External validation was performed using data from three other hospitals. MEASUREMENTS AND MAIN RESULTS: The model derivation cohort (n = 633) had a 25% prevalence of malignant N2 or N3 disease. Younger age, central location, adenocarcinoma histology, and higher positron emission tomography-computed tomography N stage were associated with a higher prN2/3. Area under the receiver operating characteristic curve was 0.85 (95% confidence interval, 0.82-0.89), model fit was acceptable (Hosmer-Lemeshow, P = 0.62; Brier score, 0.125). We externally validated the model in 722 patients. Area under the receiver operating characteristic curve was 0.88 (95% confidence interval, 0.85-0.90). Calibration using the general calibration model method resulted in acceptable goodness of fit (Hosmer-Lemeshow test, P = 0.54; Brier score, 0.132). CONCLUSIONS: Our prediction rule can be used to estimate prN2/3 in patients with NSCLC. The model has the potential to facilitate clinical decision making in the staging of NSCLC.

Promoting safe infant feeding practices - the importance of structural, social and contextual factors in Southern Africa.

There has been significant progress towards the goal of eliminating vertical transmission of HIV by 2015. However, a question that remains is how we can most effectively prevent late postnatal transmission of HIV through infant feeding. Guidelines published by the World Health Organization in 2010 have been widely adopted. These guidelines place strong emphasis on exclusive breastfeeding, in some countries over-turning a prior emphasis on formula feeding. Where available, provision of antiretroviral treatment for HIV-positive mothers or prophylaxis for infants offers additional protection against vertical transmission through infant feeding. However, merely changing guidelines is not sufficient to change practice, particularly with regard to culturally sanctioned forms of feeding, such as mixed feeding. This commentary highlights structural, social and contextual barriers to effective implementation of the guidelines and suggests ways to address some of these barriers.

Starting HIV-positive babies on antiretroviral treatment: perspectives of mothers in Soweto, South Africa.

INTRODUCTION: Timely and effective initiation of antiretroviral treatment for babies infected with the human immunodeficiency virus (HIV) is critical. Mothers' perspectives on the health care and treatment of their HIV-positive babies could affect how they engage with health care. METHOD: A convenience sample of HIV-positive mothers was interviewed using qualitative methods. Thematic analysis was used to identify themes significant for participants as well as those relevant to health service provision. RESULTS: These mothers seemed relatively well-informed and positive regarding their baby's care and treatment, but their understanding and practice was influenced by their own experience, observations, and fears, as well as the views of others. Having a baby on antiretroviral treatment improved their own health care motivation, but the daily reminder that it provided of the baby's status and still possible death and the prospect of their own death constituted a heavy emotional burden. DISCUSSION: The study highlights the complexity, ambiguity, and interlocking nature of the mothers' understandings, attitudes, and concerns. This contrasts with the often fairly one-dimensional nature of communication by health care providers and highlights the need to engage more comprehensively with mothers.