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Table 1 Coefficients from linear regression of difference between haemoglobin and haematocrit/3 (expressed as "g of haemoglobin/dl")

From: Haemoglobin and haematocrit: is the threefold conversion valid for assessing anaemia in malaria-endemic settings?

Covariates Univariate coefficient(95% CI) P-value Multivariate coefficient (95% CI) P-value
Average of Hb & Hct/3     
4.5 "g of Hb/dl" -3.70 (-4.06, -3.34)§ < 0.001 -2.33 (-2.78, -1.89)§ < 0.001
Each additional "g of Hb/dl" +0.28 (+0.24, +0.32) < 0.001 +0.17 (+0.13, +0.22) < 0.001
Age:     
6 – 12 months -1.07 (-1.14, -0.99)§ < 0.001 -2.33 (-2.78, -1.89)§ < 0.001
Each additional 1 year of age -0.26 (-0.36, -0.16) < 0.001 -0.23 (-0.32, -0.15) < 0.001
P. falciparum infection:     
No -0.92 (-1.01, -0.84)§ < 0.001 -2.33 (-2.78, -1.89)§ < 0.001
Yes -0.58 (-0.71, -0.45) < 0.001 -0.08 (-0.21, +0.05) 0.23
Season:     
Dry -0.57 (-.066, -0.48)§ < 0.001 -2.33 (-2.78, -1.89)§ < 0.001
Wet -0.99 (-1.11, -0.87) < 0.001 -0.66 (-0.80, -0.51) < 0.001
Sex:     
Male -1.28 (-1.37, -1.19)§ < 0.001 -2.33 (-2.78, -1.89)§ < 0.001
Female +0.26 (+0.13, +0.39) < 0.001 +0.21 (+0.09, +0.32) < 0.001
  1. § Denotes the constant in the model – i.e. the reference category to which additional coefficients must be added