Prevalence ratios (95% CIs) for clusters of symptoms at day of interview by exposure group defined by acetylcholinesterase activity (IU/ml) during the high exposure period adjusted for sex and age (n=408)
| Symptom | Normal (>5.95 IU/ml) (n=76) | Medium (>3.95–⩽5.95 IU/ml) (n=201) | Low (⩽3.95 IU/mI) (n=131) |
| Skin or extremities (⩾3/8) | 1 | 1.77 (0.71 to 4.41) | 1.98 (0.76 to 5.16) |
| Respiratory (⩾3/7) | 1 | 4.10 (1.24 to 13.5) | 4.17 (1.23 to 14.1) |
| Systemic (⩾3/8) | 1 | 1.51 (0.64 to 3.55) | 1.78 (0.73 to 4.35) |
| Eye (⩾2/2) | 1 | 0.94 (0.32 to 2.72) | 1.93 (0.69 to 5.42) |
| CNS (⩾5/14) | 1 | 2.47 (1.02 to 5.95) | 2.54 (1.01 to 6.36) |