We have just added two studies below which examine the efficacy of the WHO Colour Scale for use in testing anemia in infants and children. Both studies found that the Colour Scale was effective and recommend its use in places with no lab.
Maternova is now distributing this diagnostic for use outside the U.S. see our product list here
The Haemoglobin Colour Scale allows a quick anemia check using a drop of blood and visual comparison to the color scale. This product is on the market. The colour of a finger prick blood sample, soaked into chromatography paper, is compared with the colour of blood of known haemoglobin content depicted on the scale in 2 g/dl increments from 4 g/dl to 14 g/dl.
The papers below also studied the efficacy of the WHO Colour Scale for detecting anemia in children and infants.
Indian J Med Res. 2008 Sep ;128 (3):278-81 19052338
Evaluation of WHO haemoglobin colour scale & palmar pallor for screening of anaemia among children (6-35 months) in rural Wardha, India.
N Sinha, P R Deshmukh, B S Garg
Dr Sushila Nayar School of Public Health, Mahatma Gandhi Institute of Medical Sciences, Sewagram, India.