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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2009 Nov 4;20(6):559–569. doi: 10.1038/jes.2009.54

Table 8.

Categorical agreement between interviewer-administered questionnaire intensity score and 2,4-D measurements for low, medium, and high groups

Categorical Difference (%)a Chi-Square
Measurement 0 1 2 Statistic p-value
PSTCONC 50 38 12 10.4 0.034
PSTRATE 44 48 8 9.3 0.053
HAND 56 35 9 19.7 0.001
BODY 46 35 19 6.5 0.162
AIR 37 48 15 7.8 0.099
a

0 = exact agreement, 1 = one-category difference, and 2 = two-category difference