Table 4. Comparison of Hg, Pb, Cd, and As concentrations (µg/kg) in meconium in different studies.
| PositivePercentage | Median | Range/IQRa | Reference | |
| Manila, Philippines (n = 426) | Ostrea Jr. et al., 2002 | |||
| Hg (µg/kg) | 83.9 | 3.17 | 0.43–71.6 | |
| Pb (mg/kg) | 26.5 | 35.8 | 8.23–603 | |
| Cd (mg/kg) | 8.50 | 13.4 | 2.09–27039 | |
| Kocaeli, Turkey (n = 117) | Türker et al., 2006 | |||
| Pb (mg/kg) | 100 | 46.5 | 1399a | |
| Cd (mg/kg) | 100 | 2.3 | 55.6a | |
| Vienna, Austria(n = 36) | Gundacker et al., 2010 | |||
| Hg (µg/kg) | 100 | 4.00 | 0.40–128 | |
| Pb (µg/kg) | 100 | 15.5 | 1.90–103 | |
| Northern Taiwan(n = 545) | This study | |||
| Hg (µg/kg) | 100 | 82.6 | 43.9a | |
| Pb (µg/kg) | 100 | 19.4 | 24.0a | |
| Cd (µg/kg) | 100 | 7.27 | 10.9a | |
| As (µg/kg) | 100 | 37.3 | 28.6a |
a
IQR, Inter-quartile range: third quartile to first quartile.