Table 5.

Arithmetic means, geometric means and geometric standard deviation of post-application urine concentrations by Version 2 algorithm score category.

2,4-D
Category	Range	N	AM	GM	GSD
<50	12–48	40	30	15	3.2
50–100	59–90	24	78	39	3.6
>100	110–160	24	178	69	4.7
All		88	84	30	4.2
p-trend	<0.01
Chlorpyrifos 1
Category	Range	N	AM	GM	GSD
<50	24–36	9	10	8	2.1
≥50	70–110	8	22	16	2.1
All		17	11	10.6	2.3
p-trend	0.03

¹ TCPy measured as a urinary biomarker for chlorpyrifos.

Abbreviations: AM = Arithmetic Mean, GM = geometric mean, GSD = Geometric Standard Deviation.