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Vivian Welch and colleagues present consensus-based guidelines for reporting equity-focused systematic reviews, the PRISMA-Equity extension.

SUMMARY Prognostic factor scoring systems provide one method of predicting severity of acute pancreatitis. This paper reports the prospective assessment of a system using nine factors available within 48 hours of admission. This assessment does not include patient data used to compile the system. Of 405 episodes of acute pancreatitis occurring in a seven year period, 72% had severity correctly predicted by the system; 31% of 131 episodes with three or more factors present were severe and 8% of 274 episodes with less than three factors were severe. Assessment of individual factors revealed only one which did not predict severity. A scoring system based on the other eight factors correctly predicted severity in 79% of episodes. Prognostic factor scoring systems (i) alert the clinician to potentially severe disease, (ii) allow comparison of severity within and between patient series and (iii) will allow rational selection of patients for trials of new treatment.

One hundred and sixty-one consecutive patients with primary acute pancreatitis were admitted to a doubleblind trial of intravenous Trasylol therapy as a supplement to a standard regimen of conservative management. The patients were subdivided into younger (less than 60 years) and older patients (aged 60 years and over), and subjects in each group were randomly allocated on a double-blind basis either to Trasylol therapy (starter 500 000 KIU and thereafter 200 000 q.i.d. for 5 days) or to placebo. There were 14 deaths (8.7per cent), 7 in the Trasylol and 7 in the placebo group, and no significant difference was found in either the mortality or the major complications rate, eifher overall or within either age group.All I4 patients who died met the objective criteria for severe acute pancreatitis determined by the presence of at least three of a possible nine factors during the first 48 h of admission. Severe acute pancreatitis was present in 37 per cent of patients, who were evenly distributed between the Trasylol and placebo groups. Neither in those patients with severe nor those with less severe acute pancreatitis was there any sign%cant difference between the two therapeutic regimens. Supplementary intravenous Trasylol therapy at this dosage confers no advantage over standard conservative treatment in the management of patients with primary acute pancreatitis.

The population-level neural dynamics underlying HIV-associated neurocognitive disorders (HAND) are poorly understood. Wiesman et al. report that spontaneous and oscillatory neural activity in occipital cortices distinguish HIV-infected patients from uninfected controls, and patients by HAND status. This is the first neuroimaging evidence to dissociate HIV-infected patients with and without HAND.

BackgroundAt the Rio Summit in 2011 on Social Determinants of Health, the global community recognized a pressing need to take action on reducing health inequities. This requires an improved evidence base on the effects of national and international policies on health inequities. Although systematic reviews are recognized as an important source for evidence-informed policy, they have been criticized for failing to assess effects on health equity.MethodsThis article summarizes guidance on both conducting systematic reviews with a focus on health equity and on methods to translate their findings to different audiences. This guidance was developed based on a series of methodology meetings, previous guidance, a recently developed reporting guideline for equity-focused systematic reviews (PRISMA-Equity 2012) and a systematic review of methods to assess health equity in systematic reviews.ResultsWe make ten recommendations for conducting equity-focused systematic reviews; and five considerations for knowledge translation. Illustrative examples of equity-focused reviews are provided where these methods have been used.ConclusionsImplementation of the recommendations in this article is one step toward monitoring the impact of national and international policies and programs on health equity, as recommended by the 2011 World Conference on Social Determinants of Health.

Combination antiretroviral therapy transformed HIV-infection from a terminal illness to a manageable condition, but these patients remain at a significantly elevated risk of developing cognitive impairments and the mechanisms are not understood. Some previous neuroimaging studies have found hyperactivation in fronto-parietal networks of HIV-infected patients, whereas others reported aberrations restricted to sensory cortices. In this study, we utilize high-resolution structural and neurophysiological imaging to determine whether alterations in brain structure, function, or both contribute to HIV-related cognitive impairments. HIV-infected adults and individually-matched controls completed 3-Tesla structural magnetic-resonance imaging (sMRI) and a mechanoreception task during magnetoencephalography (MEG). MEG data was examined using advanced beamforming methods, and sMRI data was analyzed using the latest voxel-based morphometry methods with DARTEL. We found significantly reduced theta responses in the postcentral gyrus and increased alpha activity in the prefrontal cortices of HIV-infected patients compared with controls. Patients also had reduced gray matter volume in the postcentral gyrus, parahippocampal gyrus, and other regions. Importantly, reduced gray matter volume in the left postcentral gyrus was spatially-coincident with abnormal MEG responses in HIV-infected patients. Finally, left prefrontal and postcentral gyrus activity was correlated with neuropsychological performance and, when used in conjunction, these two MEG findings had a sensitivity and specificity of over 87.5% for HIV-associated cognitive impairment. This study is the first to demonstrate abnormally increased activity in association cortices with simultaneously decreased activity in sensory areas. These MEG findings had excellent sensitivity and specificity for HIV-associated cognitive impairment, and may hold promise as a potential disease marker.

ObjectiveTo identify the neural markers of attention dysfunction in patients with HIV-associated neurocognitive disorder (HAND).MethodsSixty participants, including 40 HIV-infected adults (half with HAND) and 20 demographically matched controls performed a visual selective attention task while undergoing high-density magnetoencephalography. Neuronal activity related to selective attention processing was quantified and compared across the 3 groups, and correlated with neuropsychological measures of attention and executive function. Spontaneous neural activity was also extracted from these attention-related cortical areas and examined with respect to HAND status.ResultsHIV-infected participants with and without HAND exhibited behavioral selective attention deficits on the magnetoencephalography task, as indicated by an increased flanker effect. Neuronal measures of flanker interference activity in the alpha and theta range revealed differential dynamics in attention-related brain areas across the 3 groups, especially in those with HAND. In addition, theta range flanker interference activity in the left inferior frontal and dorsolateral prefrontal cortex was associated with executive function and attention composite scores, respectively. Progressively stronger spontaneous alpha and theta activity was also found in unimpaired HIV-infected and HAND participants relative to controls across brain regions implicated in different components of attention processing.ConclusionsBehavioral and neuronal metrics of selective attention performance distinguish participants with HAND from controls and unimpaired HIV-infected participants. These metrics, along with measures of local spontaneous neural activity, may hold promise as early markers of cognitive decline in participants with HIV infection and be useful prognostic indicators for HAND.