Skip to main content

Table 3 Physical stress, catabolism, and changes in body fluid volume indices

From: Oral nutrition or water loading before hip replacement surgery; a randomized clinical trial

Parameter

Fasting

Water

Nutrition

Physical stress

   

Serum cortisol (nmol/L)

   

 Day 1

447 (161–620)

253 (118–544)

376 (222–553)

Urine cortisol/creatinine

   

 Day 1 to Day 2

40 (15–99)

41 (18–54)

41 (27–54)

 Day 2 to Day 3

20 (7–38)

20 (8–33)

26 (14–34)

Muscle catabolism

   

Urine methylhistidine/ creatinine

   

 Day 1 to Day 2

18.0 (2.0)

17.3 (2.6)

17.5 (2.7)

 Day 2 to Day 3

19.3 (2.8)

18.1 (2.7)

18.6 (3.1)

Body fluid volumes

   

ECF volume change (%)

   

 Day 0 to Day 2

−1 (4)

0 (6)

−2 (5)

 Day 0 to Day 3

0 (6)

+1 (6)

−2 (6)

ICF volume change (%)

   

 Day 0-Day 2

+9 (22)

−2 (10)

+6 (11)

 Day 0-Day 3

−1 (10)

+3 (23)

+8 (22)

TBW volume change (%)

   

 Day 0 to Day 2

+3 (8)

−1 (5)

+2 (5)

 Day 0 to Day 3

−1 (5)

+2 (10)

+2 (9)

  1. Data are the mean (SD) or the median (25th-75th percentiles) depending on the distribution.
  2. ECF, extracellular; ICF, intracellular; TBW, total body water.