Transmission electron microscope (TEM) fibre concentrations in BALF of 16 subjects with an environmental erionite exposure (in fibre/ml BALF)
| Erionite | Chrysotile | Tremolite | TiO2 | Other non-asbestos | |
| All fibres | 388 (3.9, 187 to 802) | 1.8 (11.7, 0 to 7.3) | 5.7 (9.6, 1.0 to 21.2) | 13.3 (12.8, 2.7 to 54.5) | 112.1 (3.9, 48 to 262) |
| Maximum | 3333 | 434 | 153 | 593 | 527 |
| Fibre length ⩾5 μm | 130 (9.5, 38.7 to 434) | 0.7 (4.6, 0 to 2.9) | ND | 0.3 (2.1, 0 to 1.4) | 1.2 (4.7, 0 to 4.6) |
| Maximum | 1844 | 241 | 89 | 89 |
Concentrations reported as GM (GSD, 95% CI); ND=not detected.