Skip to main content

Table 2 Blood hemoglobin and intravascular volumes

From: Sex and age interaction in fundamental circulatory volumetric variables at peak working capacity

 

Young

Older

P for age comparison

P for sex

P for sex

Hbmass (g)

655.8 ± 86.6

1011.9 ± 133.8*

 < 0.001

610.3 ± 81.3a

923.8 ± 116.0*a

 < 0.001

0.046

0.033

Hbmass (g kg−1)

10.3 ± 1.5

13.1 ± 1.5*

 < 0.001

10.2 ± 1.2

11.6 ± 1.3*a

 < 0.001

0.833

0.002

Hb (g dL−1)

13.2 ± 1.0

15.4 ± 0.7*

 < 0.001

13.3 ± 0.6

14.9 ± 1.0*

 < 0.001

0.512

0.111

Hct (%)

40.4 ± 3.0

47.2 ± 1.9*

 < 0.001

40.9 ± 1.8

45.7 ± 3.1*

 < 0.001

0.508

0.107

RBCV (mL)

2248 ± 295

3407 ± 450*

 < 0.001

2060 ± 274a

3111 ± 387*a

 < 0.001

0.046

0.033

RBCV (mL kg−1)

34.8 ± 5.2

43.9 ± 5.1*

 < 0.001

34.5 ± 4.2

38.9 ± 4.3*a

 < 0.001

0.837

0.002

PV (mL)

3332 ± 508

3810 ± 470*

0.016

2983 ± 418a

3709 ± 530*

 < 0.001

0.021

0.550

PV (mL kg−1)

51.4 ± 7.6

49.3 ± 6.9

0.445

49.8 ± 6.1

46.4 ± 6.1

0.038

0.469

0.176

BV (mL)

5580 ± 717

7216 ± 882*

 < 0.001

5043 ± 667a

6820 ± 796*

 < 0.001

0.020

0.150

BV (mL kg−1)

86.2 ± 11.5

93.2 ± 11.5

0.118

84.3 ± 9.8

85.4 ± 8.8a

0.675

0.582

0.018

  1. Significant P values (< 0.05) are highlighted in bold
  2. Data are expressed as mean ± SD
  3. BV, blood volume; Hb, hemoglobin concentration; Hbmass, total circulating hemoglobin mass; Hct, hematocrit; PV, plasma volume; RBCV, red blood cell volume
  4. *P < 0.05 compared with age-matched women
  5. aP < 0.05 compared with sex-matched young individuals