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Reporting missing participant data in randomised trials: systematic survey of the methodological literature and a proposed guideby Akl et al 2016
Authors conducted a systematic survey of the methodological literature to identify recommended approaches for how and what randomised clinical trial (RCT) authors should report on missing participant data and, on the basis of these approaches, to propose guidance for RCT authors. Most identified approaches invite trial authors to report the extent of MPD and the underlying reasons. Fewer approaches focus on reporting missingness patterns, methods for handling MPD and implications of MPD on results.
New articles from the African Society for Laboratory Medicine (ASLM).
Postnatal growth standards for preterm infants: the Preterm Postnatal Follow-up Study of the INTERGROWTH-21st Projectby INTERGROWTH-21st
The first international stnadards for monitroing the growth of preterm babies have now been published in the Lancet Global Health (October 2015).
Individual Participant Data (IPD) Meta-analyses of Randomised Controlled Trials: Guidance on Their Useby Tierney et al
Systematic reviews involving the central collection and analysis of individual participant data (IPD) usually are larger-scale, international, collaborative projects that can bring about substantial improvements to the quantity and quality of data, give greater scope in the analyses, and provide more detailed and robust results. Following this step-by-step guide will help reviewers and users of IPD meta-analyses to understand them better and recognise those that are well designed and conducted and so help ensure that policy, practice, and research are informed by robust evidence about the effects of interventions.
Fetal Growth Standards for ultrasound measurements of head circumference (HC), bi-parietal diameter (BPD), occipito-frontal diameter (OFD), femur length (FL) and abdominal circumference (AC) are now available for download. For information about how to perform these measurements, or for other information on standards in ultrasound imaging, please see the ultrasound training toolkit.
The methodology of systematic reviews—although laid out three or more decades ago—is continuously and rapidly updated by scientists specializing in research synthesis. Now, Systematic Reviews is publishing a series of articles including methods and examples of accelerating approaches to conducting literature reviews.
This protocol outlines the technique for taking a pregnant woman's blood pressure. http://www.medscinet.net/Intergrowth/patientinfodocs/BP%20protocol.pdf
The aim of this manual is to ensure all trained ultrasonographers are familiar with the standardized way crown-rump length measurements should be taken for the purposes of using the INTERGROWTH-21st fetal growth standards. http://www.medscinet.net/Intergrowth/patientinfodocs/CRLstandardisation_Website.pdf
This manual details the technique for assessing sleep-wake cycles in children. http://www.medscinet.net/Intergrowth/patientinfodocs/Sleep-wake%20cycle%20assessment%20manual%20July%202014.pdf
Despite published guidance on writing the abstract in the PRISMA Statement guiding the reporting of systematic reviews in general and elsewhere, evaluations show that reporting of systematic reviews in journal and conference abstracts is poor. Teh authors developed consensus-based reporting guidelines as an extension to the PRISMA Statement on good reporting of systematic reviews and meta-analyses in abstracts.
In this article, the authors illustrate five basic statistical concepts that can significantly impact the interpretation of the medical literature and its application to the care of patients, drawing examples from the vaccine literature: (i) consider clinical and statistical significance separately, (ii) evaluate absolute risks rather than relative risks, (iii) examine confidence intervals rather than p values, (iv) use caution when considering isolated significant p values in the setting of multiple testing, and (v) keep in mind that statistically nonsignificant results may not exclude clinically important benefits or harms.
In determining the feasibility of establishing a biorepository at your facility, there are several key factors to consider. But first, there are a few that must be in place before commencing. They are:
- The commitment of your institutional
- The trust of the community within which you work
- Informed consents that allow specimens to be used for multiple research studies
- Vision/commitment for the distribution and sharing of biospecimens and data with the wider scientific community
We share the WHO 2009 guideline that provides a framework for integrating nutrition support into the routine care of HIV-infected children (6 months-14 years). HIV-infected children deserve special attention because of their additional needs to ensure growth and development and their dependency on adults for adequate care including nutrition care and support for treatment. Vertical implementation of HIV programmes, such as PMTCT and ART, have resulted in missed opportunities to gain synergy with other existing services.
Previously we have shared the guidelines pertaining to the early initiation and continuation of breast feeding and complementary feeding for newborns and infants. However there are concerns regarding breast feeding for women living with HIV. In particular, evidence has been reported that antiretroviral (ARV) interventions to either the HIV-infected mother or HIV-exposed infant can significantly reduce the risk of postnatal transmission of HIV through breastfeeding. This evidence has major implications for how women living with HIV might feed their infants, and how health workers should counsel these mothers. In light of this, the World Health Organization (WHO) commenced a guideline development process, culminating in a Guideline Development Group meeting in Geneva on 22–23 October 2009. We share here the revised guidelines by WHO for principles and recommendations for infant feeding inthe context of HIV.