Published age-based weight estimation methods
| Method | Number of formulae | Lower limit | Upper limit | General observations | Studies |
|---|---|---|---|---|---|
| APLS9 | 1 | 1 year | 10 year | ▸ tends to underestimate weight ▸ accuracy differs in different ethnic groups ▸ accuracy decreases as weight increases ▸ accuracy decreases as age increase | 12,14,16,18–22 |
| Australian Resuscitation Council10 | 2 | 1 year | N/A | ▸ tends to underestimate weight | 22 |
| Argall11 | 1 | 1 year | 10 year | ▸ derived from a UK cohort (n=300) ▸ tends to underestimate weight ▸ accuracy differs in different ethnic groups ▸ accuracy decreases as weight increases | 11, 18, 21, 23 |
| Best Guess12 | 3 | Birth | 14 year | ▸ derived from an Australian cohort (n=70 181) ▸ tends to overestimate weight ▸ accuracy decreases as age increases | 12, 18, 20, 22, 24 |
| Leffler13 | 2 | Birth | 10 year | ▸ excerpted from a general reference ▸ accuracy differs in different ethnic groups ▸ overestimates weight in children ≤25 kg ▸ underestimates weight in children >25 kg | 17, 25 |
| Luscombe-Owens14 | 1 | 1 year | 10 year | ▸ derived from a UK cohort (n=13 998) ▸ tends to underestimate weight | 14 |
| Nelson15 | 3 | 3 months | 12 year | ▸ tends to overestimate weight ▸ accuracy decreases as age increases | 21 |
| Park16 | 3 | birth | 14 year | ▸ derived from a Korean cohort (n=124 095) ▸ error increases with increasing age ▸ greater bias at lower ages | 16 |
| Shann17 | 2 | 1 year | N/A | ▸ excerpted from a general reference ▸ tends to underestimate weight ▸ accuracy differs in different ethnic groups | 17 |
| Theron17 | 1 | 1 year | 10 year | ▸ derived from a Pacific Island cohort (n=909) ▸ overestimates weight in children ≤40 kg ▸ underestimates weight in children >40 kg | 17, 25 |