Table 4.
Some predictive equations commonly used in clinical practice and tested among different hospitalized patients against IC.
| Equations | Parameters Used for Calculation | Accuracy Rate * |
|---|---|---|
| General Hospitalized Population | ||
| 25 kcal/kg | 25 × WT | 43% [10] 23% [87] |
| Harris & Benedict (1919) | M: 13.75 × WT + 5.00 × HT − 6.75 × age + 66.47 F: 9.56 × WT + 1.85 × HT − 0.67 × age + 655.09 |
43% [10] 38% [87] |
| Ireton-Jones (1992) | 1925 − 10 × age + 5 × WT + (281 if male) + (292 if trauma) + (851 if burn) | 28% [10] |
| Mifflin-St Jeor (1990) | M: 10 × WT + 6.25 × HT − 5 × age + 5 F: 10 × WT + 6.25 × HT − 5 × age − 161 |
35% [10] 32% [87] |
| Schofield (1985) | 8.4 × WT + 4.7 × HT + 200 | 42% [87] |
| Anorexic Patients (BMI < 16) | ||
| Bernstein et al. (1983) | M: 11.02 × WT + 10.23 × HT − 5.8 × age − 1032 F: 7.48 × WT − 0.42 × HT − 3 × age + 844 |
40% [73] |
| Harris & Benedict (1919) | M: 13.75 × WT + 5.00 × HT − 6.75 × age + 66.47 F: 9.56 × WT + 1.85 × HT − 0.67 × age + 655.09 |
39% [73] |
| Huang et al. (2004) | 10.16 × WT + 3.93 × HT − 1.44 × age + 273.82 × sex + 60.65 | 43% [73] |
| Lazzer et al. (2007) | M: 0.05 × WT + 4.65 × HT − 0.02 × age − 3.60 F: 0.04 × WT + 3.62 × HT − 2.68 |
39% [73] |
| Mifflin-St Jeor (1990) | M: 10 × WT + 6.25 × HT − 5 × age + 5 F: 10 × WT + 6.25 × HT − 5 × age − 161 |
40% [73] |
| Müller et al. (2004) | 0.05 × WT + 1.01 × sex + 0.015 × age + 3.21 | 37% [73] |
| Owen (1987) | M: WT × 10.2 + 879 F: WT × 7.18 + 795 |
41% [73] |
| Obese Patients (BMI > 30) | ||
| Bernstein et al. (1983) | M: 11.02 × WT + 10.23 × HT − 5.8 × age − 1032 F: 7.48 × WT − 0.42 × HT − 3 × age + 844 |
16% [88] 21% [89] |
| Harris & Benedict (1919) | M: 13.75 × WT + 5.00 × HT − 6.75 × age + 66.47 F: 9.56 × WT + 1.85 × HT − 0.67 × age + 655.09 |
64% [88] |
| Huang et al. (2004) | 10.16 × WT + 3.93 × HT − 1.44 × age + 273.82 × sex + 60.65 | 66% [88] 53% [89] 54% [90] |
| Lazzer et al. (2007) | M: 0.05 × WT + 4.65 × HT − 0.02 × age − 3.60 F: 0.04 × WT + 3.62 × HT − 2.68 |
58% [88] 46% [90] |
| Mifflin-St Jeor (1990) | M: 10 × WT + 6.25 × HT − 5 × age + 5 F: 10 × WT + 6.25 × HT − 5 × age − 161 |
52% [89] 56% [90] |
| Müller et al. (2004) | 0.05 × WT + 1.10 × sex + 0.016 × age + 2.92 | 60% [88] 58% [89] 47% [90] |
| Owen (1987) | M: WT × 10.2 + 879 F: WT × 7.18 + 795 |
38% [73] 40% [89] |
| Critically Ill Patients | ||
| 25 Kcal/Kg | 25 × WT | 12% [91] |
| Harris-Benedict (1919) | M: 13.75 × WT + 5.00 × HT − 6.75 × age + 66.47 F: 9.56 × WT + 1.85 × HT − 0.67 × age + 655.09 |
31% [91] 32% [92] |
| Ireton-Jones (1997) | 1925 − 10 × age + 5 × WT + (281 if M) + (292 if trauma) + (851 if burn) | 37% [93] |
| Mifflin-St Jeor (1990) | M: 10 × WT + 6.25 × HT − 5 × age + 5 F: 10 × WT + 6.25 × HT − 5 × age − 161 |
18% [91] 35% [10] |
| Owen (1987) | M: WT × 10.2 + 879 F: WT × 7.18 + 795 |
12% [91] |
| Penn State (2003) | 0.85 × HB + 175 × Tmax + 33 × Ve − 6433 | 43% [10] |
| Swinamer (1990) | 945 × BSA − 6.4 × age + 108 T + 24.2 × RR + 81.7 × VT − 4349 | 55% [93] 45% [10] |
* % of patients where the predicted value (by equation) is within 10% of measured value (by IC). BSA, body surface area (m2); HB, Harris–Benedict value; HT, height (cm); RR, respiratory rate (breath/min); sex: males (M) = 1, female (F); T, temperature (°C); Tmax, maximum temperature (°C) in previous 24 h; TV, tidal volume (L); Ve, expired minute ventilation at the time of collection (L/min); WT, weight (kg).