Table 2.
Summary statistics of PM and endotoxin concentrations by fuel type and sampling fraction for 24-hr Malawi samples.
| PM (mg/m3) |
Endotoxin (EU/m3) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Fuel/particle size | n | Range | Mean ± SD | Median | Range | Mean ± SD | Median | < LOD |
| Wood | ||||||||
| TIP | 4 | 0.43–0.81 | 0.65 (0.18) | 0.68 | 34–141 | 64 (52) | 40 | 0 |
| Resp | 9 | 0.03–0.70 | 0.32 (0.25) | 0.24 | 5–106 | 31 (34) | 26 | 4a |
| Charcoal | ||||||||
| TIP | 2 | 0.20–0.32 | 0.26 (0.09) | 0.26 | 21–26 | 24 (3.6) | 24 | 0 |
| Resp | 17 | 0.04–0.72 | 0.25 (0.17) | 0.23 | 4–256 | 35 (59) | 21 | 6b |
Abbreviations: LOD, analytical limit of detection (Malawi, 27.7 EU/filter; Nepal, 2.85 EU/filter); Resp, respirable PM; TIP, total inhalable PM.
a
Concentrations generated from filters assigned values of LOD/2 were 4.88, 5.22, 5.24, and 5.40 EU/m3.
b
Concentrations generated from filters assigned values of LOD/2 were 4.08, 4.26, 4.29, 4.60, 5.20, and 5.31 EU/m3.