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Airborne toluene levels and hippuric acid in urine levels of the participants
| Parameter | Median | Interquartile range | Range | p |
|---|---|---|---|---|
| Air borne toluene levels (ppm; n = 87) | 55 | 87 | 12–198 | |
| Hippuric acid in urine levels (mg/g creatinine) | ||||
| Nonexposed controls (n = 87) | 200 | 210 | 50–580 | < 0.001 |
| Exposed workers (n = 87) | 800 | 669 | 90–2547 | |
