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Table 4 Fecal composition and energy, fat, protein, and carbohydrate absorption capacity for ICU patients with normal stools and with diarrhea

From: Malabsorption and nutritional balance in the ICU: fecal weight as a biomarker: a prospective observational pilot study

  < 350 g/day feces
n= 38
(normal stools)
> 350 g/day feces
n= 10
(diarrhea)
P value
Fecal composition
FWW (g/day) 157 ± 79 796 ± 942 < 0.001
Percentage of dry weight (%) 17.6 ± 5.8 13.5 ± 4.8 0.047
F Energy (kcal/day) 146.4 ± 86.7 445.5 ± 201.3 < 0.001
Energy wet feces (kcal/g) 0.97 ± 0.36 0.78 ± 0.37 0.135
Energy dry feces (kcal/g) 5.49 ± 0.69 5.59 ± 1.09 0.720
F Fat (g/day) 2.4 ± 2.6 11.4 ± 14.3 < 0.001
F Nitrogen (g/day) 0.9 ± 0.5a 2.6 ± 1.1b < 0.001
F Protein (g/day) 5.6 ± 3.1a 16.2 ± 7.1b < 0.001
F Carbohydrate (g/day) 24.1 ± 17.7a 52.1 ± 18.9b 0.003
Absorption capacity
Energy absorption (%) 93.1 ± 4.1 76.5 ± 10.6 < 0.001
Fat absorption (%) 96.8 ± 3.3 84.7 ± 17.2 < 0.001
Protein absorption (%) 93.6 ± 3.8a 82.5 ± 7.2b < 0.001
Carbohydrate absorption (%) 89.6 ± 6.7a 74.5 ± 12.9b < 0.001
  1. an = 30; bn = 5. FCarbohydrate, fecal carbohydrate content; FEnergy, fecal energy loss; FFat, fecal fat content; FNitrogen, fecal nitrogen content; FProtein, fecal protein content; FWW, fecal wet weight.