Fig. 2From: Characteristics of hemoglobin distributions in preschool children and non-pregnant women of reproductive age and their implications for establishing quality control criteria for hemoglobin data in field surveys: evidence from 483 surveys conducted in refugee settings worldwideCorrelation between survey-level hemoglobin means and standard deviations in 461 child surveys and 401 women surveys. Correlation of a child (6–59 mo) survey-level Hb SD and Hb means and b non-pregnant WRA (15–49 y) survey-level Hb SD and Hb means using a Hb exclusion range of 4.0–18.0 g/dL. Red circles represent data from surveys conducted in Uganda (n = 56 child surveys and n = 39 WRA surveys). Spearman’s rho was calculated both including and excluding Uganda data. Hb Hemoglobin; SD Standard deviation; WRA Women of reproductive ageBack to article page