. 2013 Sep 13;2:18. doi: 10.1186/2047-0525-2-18

Table 3.

Allometrically scaled oxygen uptake

Haemoglobin concentration

P -value

<10 g dl^-1

10 to 12 g dl^-1

>12 g dl^-1

ANOVA

Trend

\dot{V} O_{2}

peak (ml kg^-0.83.min^-1)

26.7 (7.8) 83

29.9 (8.4) 352

34.4 (10.1) 1339

<0.0001

<0.0001^a

27.8 (7.1) 83

31.2 (8.2) 352

34.0 (8.7) 1333

<0.0001

<0.0001^b

27.8 (6.9) 64

31.5 (8.1) 291

34.3 (8.1) 1136

<0.0001

<0.0001^c

AT (ml kg^-0.83.min^-1)

20.9 (4.6) 67

22.7 (5.0) 307

24.4 (5.2) 1257

<0.0001

<0.0001^a

21.3 (4.5) 67

23.2 (4.9) 307

24.3 (5.1) 1251

<0.0001

<0.0001^b

21.3 (4.3) 49

23.5 (4.8) 252

24.4 (4.8) 1068

<0.0001

<0.0001^c

$\dot{V} O_{2}$ peak and AT, mean (SD) number of patients, by haemoglobin classification. AT anaerobic threshold, [Hb] haemoglobin concentration, $\dot{V} O_{2}$ peak, peak oxygen uptake.

^aAdjusted for weight and testing site.

^bAdjusted for weight, testing site, age, sex.

^cAdjusted for weight, testing site, age, sex, revised cardiac risk index, diabetes, creatinine and operation category.