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. Author manuscript; available in PMC: 2011 Jul 28.
Published in final edited form as: Clin Neurophysiol. 2009 Aug 14;120(9):1693–1698. doi: 10.1016/j.clinph.2009.07.034

Table 1.

Comparison of the vegetable farmers and control group (Counting error: the difference between the target tone count made by the subject and the actual target count.)

Farmers
(n=35)
mean (SD)		 Controls
(n=38)
mean (SD)		 Significance
(p value)		 Mean difference
(95% CI)
N100 latency (ms) 103.5 (16.5) 99.1 (10.5) 0.173 4.4 (−2.0 – 10.8)
P200 latency (ms) 186.4 (18.0) 178.4 (21.4) 0.094 8.0 (1.4 – 17.4)
N200 latency (ms) 240.5 (24.4) 226.3 (25.4) 0.019 14.2 (2.4 – 25.9)
P300 latency (ms) 394.5 (47.0) 362.4 (27.0) 0.0006 32.1 (14.1 – 50.0)
P300 amplitude (μV), Cz 14.9 (8.6) 12.1 (5.7) 0.108 2.8 (−0.6 – 6.2)
P300 amplitude (μV), Pz 12.4 (5.1) 11.9 (5.2) 0.670 0.5 (−1.9 – 3.0)
Counting errors 4.8 (3.6) 3.2 (2.7) 0.044 1.5 (0.4 – 3.0)