biostudies-literatureUnknown12Stevens GA<h4>Background</h4>Previous studies have observed that haemoglobin concentrations can be affected by type of blood collection, analysis methods and device, and that near-in-time population-based surveys report substantially different anaemia prevalence. We investigated whether differences in mean haemoglobin or prevalence of anaemia between near-in-time surveys of the same population were associated with differences in type of blood collection or analytic approach to haemoglobin measurement.<h4>Methods</h4>We systematically identified pairs of population-based surveys that measured haemoglobin in the same population of women of reproductive age (WRA) or preschool-aged children (PSC). Surveys were matched on geographic coverage, urban/rural place of residence, inclusion of pregnant women, tJournal of global health04088https://www.ebi.ac.uk/biostudies/studies/S-EPMC9682214biostudies-literatureAssociations between type of blood collection, analytical approach, mean haemoglobin and anaemia prevalence in population-based surveys: A systematic review and meta-analysis.PMC9682214Rogers LMNamaste SStevens GAFlores-Urrutia MCPaciorek CJWirth JPRohner FfalseAssociations between type of blood collection, analytical approach, mean haemoglobin and anaemia prevalence in population-based surveys: A systematic review and meta-analysis.<h4>Background</h4>Previous studies have observed that haemoglobin concentrations can be affected by type of blood collection, analysis methods and device, and that near-in-time population-based surveys report substantially different anaemia prevalence. We investigated whether differences in mean haemoglobin or prevalence of anaemia between near-in-time surveys of the same population were associated with differences in type of blood collection or analytic approach to haemoglobin measurement.<h4>Methods</h4>We systematically identified pairs of population-based surveys that measured haemoglobin in the same population of women of reproductive age (WRA) or preschool-aged children (PSC). Surveys were matched on geographic coverage, urban/rural place of residence, inclusion of pregnant women, t2022-01-01T00:00:00Z2022 Nov2025-06-01T01:20:28.031Z2025-06-01T01:20:28.031ZS-EPMC96822143641210810.7189/jogh.12.04088