In an aggregated variable, expressing the number of times sprayed and whether or not OPs were used, the experience of symptoms in connection with spraying was found to be depending on the degree of pesticide exposure as seen in
Table 3. When comparing the experiences of toxic symptoms among those who had sprayed >3 times in the previous months with those who had sprayed 3 times or less
an OR of 3.58 (95% CI 1.44-8.92) was found after controlling for the number of protective behaviors practiced.