Table 3

Haemoglobin concentration, overall anaemia prevalence, bias and concordance as determined by capillary and venous blood using the HemoCue (Hb 301 or Hb 201+)

CountryGroupHemoCue modelnHb g/L capillaryAnaemiaHb g/L venousAnaemiaBias g/L (precision) capillary−venousConcordance coefficient
Mean±SDn (%)Mean±SDn (%)Mean (95% CI)ρc (95%CI)
IndiaWomen201+982114.4±16.5581 (59.2%)122.7±17.7348 (35.4)−8.3 (−22.1 to 4.8)0.81 (0.80 to 0.83)
LaosChildren301129111.0±10.754 (41.9%)113.6±14.047 (36.4%)−2.6 (−28.5 to 23.5)0.43 (0.30 to 0.56)
USAAdults201+33144.0±15.0CD142.5±13.3CD1.5 (−7.7 to 10.6)0.94 (0.91 to 0.98)
  • Data were adjusted for smoking and altitude, and WHO cut-offs were applied for anaemia diagnosis (children 6–59 months <110 g/L; non-pregnant women above 15 years <120 g/L; men above 15 years <130 g/L).29

  • CD, cannot determine; Hb, haemoglobin.