Characterization of the population affiliated to the subsidized health insurance scheme in Colombia: a systematic review and meta-analysis.

BACKGROUND: Some reports suggest there are differences in health needs between the population affiliated to the subsidized health insurance scheme (SS) and those affiliated to the contributory health insurance scheme (CS) in Colombia. The objective of this study was to identify the epidemiological profile of the population affiliated to the SS in Colombia and to compare the main epidemiological features of the SS to the CS. METHODS: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) methodology, the search was carried out from 1993, with no other restriction. The information was synthesized into five categories according to the most important risk populations. We estimated combined incidences from epidemiological surveillance data, prevalence ratio, and other measures to estimate the difference between the studied groups. A 95% confidence interval was considered. A random effects model was used weighted by the inverse of the variance of the cumulative incidence calculated for each disease. The risk of bias was assessed using the Joanna Briggs Institute's critical appraisal tools. RESULTS: A total of 16,236 articles were identified; 14,972 were excluded after title and abstract screening, 725 articles were verified as full text, and finally 268 articles were included. The relative risk of non-communicable and communicable diseases was lower in the SS than in the CS (RR: 0.37 and 0.72, respectively, p-value < 0.05). However, the risk of presenting obstetric and maternal conditions in the SS versus the CS was RR 1.55 for frequent conditions during early childhood, and for other diseases it was RR 1.28 with a p-value of < 0.05. The use of health services was different by scheme, with less demand, access, and provision being found in health services in the SS. CONCLUSIONS: This study allowed us to conclude that there are differences in the incidence, prevalence, and use of health services between health affiliation schemes (SS and CS) in Colombia, thereby assisting in decision-making for stakeholders. TRIAL REGISTRATION: PROSPERO Registration number CRD42021279234

Under-ascertainment of Respiratory Syncytial Virus infection in adults due to diagnostic testing limitations:A systematic literature review and meta-analysis

BACKGROUND: Most observational population-based studies identify RSV by nasal/nasopharyngeal swab RT-PCR only. We conducted a systematic review and meta-analyses to quantify specimen and diagnostic testing-based under-ascertainment of adult RSV infection. METHODS: EMBASE, PubMed and Web of Science were searched (Jan2000-Dec2021) for studies including adults using/comparing >1 RSV testing approach. We quantified test performance and RSV detection increase associated with using multiple specimen types. RESULTS: Among 8066 references identified, 154 met inclusion. Compared to RT-PCR, other methods were less sensitive: rapid antigen detection (pooled sensitivity, 64%), direct fluorescent antibody (83%), and viral culture (86%). Compared to singleplex PCR, multiplex PCR's sensitivity was lower (93%). Compared to nasal/nasopharyngeal swab RT-PCR alone, adding another specimen type increased detection: sputum RT-PCR, 52%; 4-fold rise in paired serology, 44%; and oropharyngeal swab RT-PCR, 28%. Sensitivity was lower in estimates limited to only adults (for RADT, DFA and Viral culture), and detection rate increases were largely comparable. CONCLUSIONS: RT-PCR, particularly singleplex testing, is the most sensitive RSV diagnostic test in adults. Adding additional specimen types to nasopharyngeal swab RT-PCR testing increased RSV detection. Synergistic effects of using ≥3 specimen types should be assessed, as this approach may improve the accuracy of adult RSV burden estimates