Table 4 Blood volume calculated with CO-rebreathing method and derived from linear regression equations with body mass and height (Formula 1) or body mass, height and lean mass (Formula 2) as predictor variables in women (n = 62) with body mass index (BMI) 18.5 to 39.9 kg/m2

From: Greater blood volume and Hb mass in obese women quantified by the carbon monoxide-rebreathing method affects interpretation of iron biomarkers and iron requirements

 

Normal-weight (n = 24)

Overweight/obese (n = 38)

Total population (n = 62)

 

Mean BV

SD

R 2

Mean BV

SD

R 2

Mean BV

SD

R 2

 

mL

mL

 

mL

mL

 

mL

mL

 

Calculated CO-rebreathing

4593

463

–

5212

823

–

4973

764

–

Formula 1

4557

448

0.52

5235

593

0.69

4973

633

0.69

Formula 2

4575

531

0.75

5221

627

0.75

4971

668

0.76

  1. Formula 1: (4698.8 × height) + (32.5 × body mass)−5342.1; Formula 2: (2686.7 × height) + (18.9 × body mass) + (66.0 × lean mass)−3932.3. Height in centimeters and body mass in kilograms. The accuracy of the regression equation was assessed using R2, the coefficient of determination. R2 presents the proportion of the observed variance that can be explained through the equation
  2. BV blood volume, CO carbon monoxide
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