The methodological quality of individual participant data meta-analysis on intervention effects: systematic review.

OBJECTIVE: To assess the methodological quality of individual participant data (IPD) meta-analysis and to identify areas for improvement. DESIGN: Systematic review. DATA SOURCES: Medline, Embase, and Cochrane Database of Systematic Reviews. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Systematic reviews with IPD meta-analyses of randomised controlled trials on intervention effects published in English. RESULTS: 323 IPD meta-analyses covering 21 clinical areas and published between 1991 and 2019 were included: 270 (84%) were non-Cochrane reviews and 269 (84%) were published in journals with a high impact factor (top quarter). The IPD meta-analyses showed low compliance in using a satisfactory technique to assess the risk of bias of the included randomised controlled trials (43%, 95% confidence interval 38% to 48%), accounting for risk of bias when interpreting results (40%, 34% to 45%), providing a list of excluded studies with justifications (32%, 27% to 37%), establishing an a priori protocol (31%, 26% to 36%), prespecifying methods for assessing both the overall effects (44%, 39% to 50%) and the participant-intervention interactions (31%, 26% to 36%), assessing and considering the potential of publication bias (31%, 26% to 36%), and conducting a comprehensive literature search (19%, 15% to 23%). Up to 126 (39%) IPD meta-analyses failed to obtain IPD from 90% or more of eligible participants or trials, among which only 60 (48%) provided reasons and 21 (17%) undertook certain strategies to account for the unavailable IPD. CONCLUSIONS: The methodological quality of IPD meta-analyses is unsatisfactory. Future IPD meta-analyses need to establish an a priori protocol with prespecified data syntheses plan, comprehensively search the literature, critically appraise included randomised controlled trials with appropriate technique, account for risk of bias during data analyses and interpretation, and account for unavailable IPD.

Knowledge, attitude, and practice of exclusive breastfeeding among mothers in East Africa: a systematic review.

BACKGROUND: Exclusive breastfeeding (EBF) is recommended for the first six months of age by the World Health Organization. Mothers' good knowledge and positive attitude play key roles in the process of exclusive breastfeeding practices. In this study, we report on a systematic review of the literature that aimed to examine the status of mothers' knowledge, attitude, and practices related to exclusive breastfeeding in East Africa, so as to provide clues on what can be done to improve exclusive breastfeeding. METHODS: A systematic review of peer-reviewed literature was performed. The search for literature was conducted utilizing six electronic databases, Pub med, Web of Science, Google Scholar, Embase, Science Direct, and Cochrane library, for studies published in English from January 2000 to June 2019 and conducted in East Africa. Studies focused on mothers' knowledge, attitudes, or practices related to exclusive breastfeeding. All papers were reviewed using a predesigned data extraction form. RESULTS: Sixteen studies were included in the review. This review indicates that almost 96.2% of mothers had ever heard about EBF, 84.4% were aware of EBF, and 49.2% knew that the duration of EBF was the first six months only. In addition, 42.1% of mothers disagreed and 24.0% strongly disagreed that giving breast milk for a newborn immediately and within an hour is important, and 47.9% disagreed that discarding the colostrum is important. However, 42.0% of mothers preferred to feed their babies for the first six months breast milk alone. In contrast, 55.9% of them had practiced exclusive breastfeeding for at least six months. CONCLUSIONS: Exclusively breastfeeding among our sample is suboptimal, compared to the current WHO recommendations. Thus, it is important to provide antenatal and early postpartum education and periodical breastfeeding counseling, to improve maternal attitudes and knowledge toward breastfeeding practices.

Prevalence of viral hepatitis B in Ghana between 2015 and 2019: A systematic review and meta-analysis.

Chronic hepatitis B (HBV) remains a significant public health problem in Ghana and past reviews conducted could not calculate a nationwide prevalence of the disease due to lack of primary research for some regions of the country. We therefore conducted this study to summarize and update the available information on HBV infection burden (prevalence) in Ghana from 2015-2019.We systematically searched PubMed, Embase, ScienceDirect, and Google Scholar to retrieve primary studies published in peer-reviewed journals from November 2015 to September 2019, assessing the prevalence of HBV among the Ghanaian populace. The review included 21 studies across all ten old regions of Ghana with a total sample population of 29 061. The HBV prevalence was estimated for subpopulations as follows: 8.36% in the adult population, 14.30% in the adolescent population, and 0.55% in children under five years (pre-school). Among adults, HBV infection prevalence was the highest in the special occupation group (14.40%) and the lowest prevalence rate of 7.17% was recorded among blood donors. Prevalence was lower in the north than in the southern part of the country. The Ashanti region had the most studies at 6/21 (29%), while no study was identified for the Upper West region. Across the country, the highest HBV infection prevalence rates were recorded in the age group of 20-40 years. The burden of hepatitis B is enormous and remains an important public health issue in Ghana. Addressing the issue will require an integrated public health strategy and rethinking of the implementation gaps in the current HBV infection control program. This will help propel the country towards eliminating the disease by 2030.

Impact of mTOR gene polymorphisms and gene-tea interaction on susceptibility to tuberculosis.

BACKGROUND: mTOR gene is a key component of the PI3K/Akt/mTOR signaling pathway, and its dysregulation is associated with various diseases. Several studies have demonstrated that tea drinking is a protective factor against tuberculosis (TB). This study was designed to explore five single nucleotide polymorphisms (SNPs) of mTOR in the Han population of China to determine how their interactions with tea drinking affect susceptibility to TB. AIM: To investigate if the polymorphisms of mTOR gene and the gene-tea interaction are associated with susceptibility to TB. METHODS: In this case-control study, 503 patients with TB and 494 healthy controls were enrolled by a stratified sampling method. The cases were newly registered TB patients from the county-level centers for disease control and prevention, and the healthy controls were permanent residents from Xin'ansi Community, Changsha city. Demographic data and environmental exposure information including tea drinking were obtained from the study participants. We genotyped five potentially functional SNP sites (rs2295080, rs2024627, rs1057079, rs12137958, and rs7525957) of mTOR gene and assessed their associations with the risk of TB using logistic regression analysis, and marginal structural linear odds models were used to estimate the gene-environment interactions. RESULTS: The frequencies of four SNPs (rs2295080, rs2024627, rs1057079, and rs7525957) were found to be associated with susceptibility to TB (P < 0.05). Genotypes GT (OR 1.334), GG (OR 2.224), and GT + GG (OR 1.403) at rs2295080; genotypes CT (OR 1.562) and CT + TT (OR 1.578) at rs2024627, genotypes CT (OR 1.597), CC (OR 2.858), and CT + CC (OR 1.682) at rs1057079; and genotypes CT (OR 1.559) and CT + CC (OR 1.568) at rs7525957 of mTOR gene were significantly more prevalent in TB patients than in healthy controls. The relative excess risk of interaction between the four SNPs (rs2295080, rs2024627, rs1057079, and rs7525957) of mTOR genes and tea drinking were found to be -1.5187 (95%CI: -1.9826, -1.0547, P < 0.05), -1.8270 (95%CI: -2.3587, -1.2952, P < 0.05), -2.3246 (95%CI: -2.9417, -1.7076, P < 0.05) and -0.4235 (95%CI: -0.7756, -0.0714, P < 0.05), respectively, which suggest negative interactions. CONCLUSION: The polymorphisms of mTOR (rs2295080, rs2024627, rs1057079, and rs7525957) are associated with susceptibility to TB, and there is a negative interaction between each of the four SNPs and tea drinking.