The EBC and urine samples of the workers were assessed three times: a) before the work shift on Friday (T0); b) at the end of the same shift, after 8 hr of work (T1); and c) before exposure on the following Monday (T2).
We use 100 data samples, including 50 samples of the worker's state just before and after the moment of proper timing and 50 other samples, to generate the logistic regression model.
However, given that the Labor Force Survey is a representative random sample of the Dutch workers, the final dataset remains broadly representative of Dutch firms (with 10 or more employees).
Fig. 7 Distribution of the sample of patients and caregivers before and after the use of the system Fig. 8 Distribution of the sample of professional workers before and after the use of the system.
We have therefore no reason to assume that our sample constitutes a highly selective sample of workers' The response to the questionnaires was satisfactory in our study.
The sample of workers was the same used to calculate the internal consistency (n = 386) (see Table 1).
The various workplaces were categorized according to the amount of exposure as determined by analysis of serum samples of the individual workers.
We recommended taking new stool samples of the kitchen workers that had been ill with gastro-enteritis symptoms and excluding all symptomatic food handlers from work for 48 hour after their first normal stool.
Results on the sample of female workers indicate that the policy had a substantially positive effect on both the probability of finding a job for the group of treated individuals (about 43%) and their level of income (397 euros per month).
Given that a random sample of workers forms the basis of the LWF database, we observe separations for workers in the LWF sample but do not observe separations rates at the firm level.
