Table 1 Mercury (μg/L), lead (μg/dl), GST (μmol/l) and vitamin E (nmol/L) levels in the control & autistic groups
Parameters | Group | N | Mean ± S.D. | P valuea | P valueb |
|---|---|---|---|---|---|
Mercury (μg/L) | Control | 32 | 5.12 ± 0.83 |  |  |
|  | Patients with autism | 58 | 6.99 ± 0.94 |  | 0.001 |
|  | Autism (mild to moderate in CARS) | 29 | 6.49 ± 0.65 | 0.042 | 0.001 |
|  | Autism (severe in CARS) | 28 | 7.31 ± 0.49 | 0.001 | |
|  | Autism (mild to moderate in SRS) | 22 | 7.02 ± 0.85 | 0.050 | 0.001 |
|  | Autism (severe in SRS) | 22 | 7.46 ± 0.59 | 0.001 | |
Lead (μg/dl) | Control | 32 | 4.73 ± 0.67 |  |  |
|  | Patients with autism | 58 | 6.79 ± 0.97 |  | 0.001 |
|  | Autism (mild to moderate in CARS) | 29 | 6.34 ± 0.82 | 0.041 | 0.001 |
|  | Autism (severe in CARS) | 28 | 6.80 ± 0.83 |  | 0.001 |
|  | Autism (mild to moderate in SRS) | 22 | 6.42 ± 0.84 | 0.040 | 0.001 |
|  | Autism (severe in SRS) | 22 | 6.95 ± 0.81 |  | 0.001 |
GST (μmol/min/ml) | Control | 30 | 0.61 ± 0.17 |  |  |
|  | Patients with autism | 30 | 0.30 ± 0.08 |  | 0.001 |
|  | Autism (mild to moderate in CARS) | 18 | 0.31 ± 0.07 | 0.043 | 0.001 |
|  | Autism (severe in CARS) | 12 | 0.26 ± 0.07 | 0.001 | |
|  | Autism (mild to moderate in SRS) | 8 | 0.32 ± 0.07 | 0.027 | 0.001 |
|  | Autism (severe in SRS) | 18 | 0.25 ± 0.06 | 0.001 | |
Vitamin E (nmol/L) | Control | 27 | 25.44 ± 2.62 |  |  |
|  | Patients with autism | 28 | 14.45 ± 2.28 |  | 0.001 |
|  | Autism (mild to moderate in CARS) | 11 | 14.56 ± 1.58 | 0.048 | 0.001 |
|  | Autism (severe in CARS) | 17 | 13.36 ± 1.47 | 0.001 | |
|  | Autism (mild to moderate in SRS) | 11 | 14.85 ± 1.36 | 0.044 | 0.001 |
|  | Autism (severe in SRS) | 12 | 13.35 ± 1.14 | 0.001 |