Comparison of acetylcholinesterase (AChe) levels between studies among exposed and non-exposed populations
| Study | Location | Study population gender | Exposed | Unexposed | ||
| n | AChe (U/g Hb) | n | AChe (U/g Hb) | |||
| Current study (Makhatini Flats)* | South Africa | Female | 366 | 29.3 | 437 | 28.6 |
| Ngowi et al22 | Tanzania | Not stated | 133 | 32.0 | 133 | 33.0 |
| Gomes et al33 | United Arab Emirates | Not stated | 532 | 29.9 | 532 | 32.1 |
| Ciesielski et al34 | United States of America | Mixed (male predominance) | 202 | 30.2 | 42 | 32.2 |
↵* In this study population: ‘exposed’ refers to sprayers and ‘unexposed’ to non-sprayers.