https://www.selleckchem.com/products/dir-cy7-dic18.html The pooled prevalence of malnutrition among hospitalized patients with COVID-19 was 49.11% (95% CI 31.67 to 66.54). The odd of mortality among patients COVID-19 with malnutrition was 10 times more likely as compared to those who were well-nourished. The prevalence of malnutrition and mortality associated with malnutrition among COVID-19 hospitalized patients was very high which entails a mitigating strategy by different stakeholders to prevent and manage malnutrition and its outcomes. This systematic review was registered in Prospero's international prospective register of systematic reviews (CRD42020215396). This systematic review was registered in Prospero's international prospective register of systematic reviews (CRD42020215396). A comprehensive set of validated core infant and young child feeding (IYCF) indicators replaced the previous guideline and created a consensus on breastfeeding and complementary feeding indicators. It remains unknown how local studies have adopted these originally absent complementary feeding indicators in their data generation. The study is aimed to evaluate the level/rate of adoption of core complementary feeding (CF) indicators in Nigeria. Meta-analysis of literature on complementary feeding indicators utilized in Nigeria by peer-reviewed articles published from 2009-2019 was conducted. A bibliographic survey was carried out in several databases, review of abstracts and full texts followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. Eligible peer-reviewed published studies were compared to the core CF indicators proposed by WHO in 2008. Data were analysed using SPSS version 25. A total of 33 articles met the inclusion criteria. Majority (72.7%) of the pdy. Hence, there is need to ensure quick adoption of standard indicators/guidelines by local studies as this will promote the generation of pooled evidence. Body mass index (BMI) has