Table 5. Median and interquantile range (IQR) of neurological symptoms and signs of the two cohorts according to BChE activity (in each cohort, depression in BChE activity was determined relative to normal ranges from the methods used).
| 2005 (n = 79) | 2009 (n = 41) | Total (n = 120) | ||||
|---|---|---|---|---|---|---|
| Depressed BChE (n = 22) | Normal BChE (n = 57) | Depressed BChE (n = 8) | Normal BChE (n = 33) | Depressed BChE (n = 30) | Normal BChE (n = 90) | |
| Median | 4.0 | 0.0 | 0.0 | 0.0 | 1.5 | 0.0 |
| IQR | 10.2 | 2.0 | 2.2 | 1.0 | 9.2 | 1.0 |
| p-value a | 0.006 | 0.75 | 0.013 | |||
a, P-value of Mann-Whitney test