Body weight |
Daily, weekly |
Alone; no information of nutritional status |
Height/length |
Daily, weekly |
Alone; no information of nutritional status |
Head circumference |
Monthly |
Especially in infants under 3 y; brain development |
BMI |
Biannually |
Body weight (kg) divided by height in meters squared; inaccurate |
Body composition tools |
Monthly |
|
Bioelectrical impedance |
|
Rapid, easy, inexpensive, portable but sensitive to hydration and temperature |
Dual X-ray absorptiometry |
|
Accurate, but exposure to radiation |
Isotope dilution method |
|
Expensive |
Energy expenditure |
Weekly, monthly |
Determine noninvasive resting energy expenditure. |
Indirect calorimetry |
|
Provide understanding of energy and substrate requirements |
Stool analysis |
Weekly, monthly |
Analyses of carbohydrates and protein stool losses. |
|
|
Determination of energy losses using bomb-calorimetry |