Table 2.
Key population characteristics for studies in the Mn comparative analysis.
| Outcome |
IQ |
Postural Balance |
|||
|---|---|---|---|---|---|
| Location |
Bahia, Brazil |
Ohio, USA |
|||
| Source of inhaled Mn | Local ferromanganese smelter | ||||
| Study | Carvalho et al. (2014) | Menezes-Filho et al. (2011) | de Sousa Viana et al. (2014) | Rugless et al. (2014) | Standridge et al. (2008) |
| Study dates | 2011 | 2007 | 2011 | 2009–2010 | 2006 |
| Lifestage (Age range) | Child (7–12 yrs) | Child (6–11 yrs) | Adult (15–55 yrs) | Child (7–9 yrs) | Adult (31–68 yrs) |
| Sample size | n = 70 | n = 83 | n = 81 | n = 48 | n = 22 |
| Median (range) measured or modeled ambient Mn concentrations | 0.114 (0.011–0.439) μg/m3 | 0.008 (0.001–0.054) μg/m3 | |||
| Outcome assessment tool | Wechsler Intelligence Scale for Children (WISC) | Wechsler Intelligence Scale for Children (WISC) | Wechsler Adult Intelligence Scale (WAIS) | Hall-Effect type portable force platform system | Hall-Effect type portable force platform system |
| Hair Mn concentrations | median (range) = 11.48 (0.52–55.74) μg/g mean (SD) = 14.6 (11.8) μg/g | mean (range) = 5.83 (0.1–86.68) μg/g SD = 11.5 μg/g | median (range) = 8.95 (0.6–44.6) μg/g | median (range) = 0.44 (0.1–7.4) μg/g mean (SEM) = 0.77 (0.16) μg/g | mean (range) = 4.4 (1.2–12.4) μg/g SD = 3.3 μg/g |