Elimian, Kelly OsezeleAderinola, OlaoluIgumbor, Ehimario2021-09-232021-09-232021Elimian, K. O. et al. (2021). Assessing the capacity of symptom scores to predict COVID-19 positivity in Nigeria: A national derivation and validation cohort study. BMJ Open, 11(9), e049699. https://doi.org/10.1136/bmjopen-2021-0496992044-605510.1136/ bmjopen-2021-049699http://hdl.handle.net/10566/6795s This study aimed to develop and validate a symptom prediction tool for COVID-19 test positivity in Nigeria.A cohort of 43 221 individuals within the national COVID-19 surveillance dataset from 27 February to 27 August 2020. Complete dataset was randomly split into two equal halves: derivation and validation datasets. Using the derivation dataset (n=21 477), backward multivariable logistic regression approach was used to identify symptoms positively associated with COVID-19 positivity (by real-time PCR) in children (≤17 years), adults (18–64 years) and elderly (≥65 years) patients separately.enCOVID-19NigeriaSymptom predictionPublic healthCOVID-19 infectionArticle