TABLE 2.

Toxicity assessment of workers in pelleted seed factories

	Factory workers (n = 31)
Respirable dust concentration in workplace
1st evaluation value (mg/m3): median (min–max)	0.26 (0.02–1.11)
2nd evaluation value (mg/m3): median (min–max)	0.10 (0.01–0.46)
B‐sampling value (mg/m3): median (min–max)	0.14 (0.01–0.97)
Respirable crystalline silica concentration in workplace
1st evaluation value × silica content (mg/m3): median (min–max)	0.0028 (0–0.0151)
2nd evaluation value × silica content (mg/m3): median (min–max)	0.0011 (0–0.0056)
Type B sampling value × silica content (mg/m3): median (min–max)	0.0009 (0–0.0092)
Age (years): mean (SD)	37.7 (7.9)
Male sex, n (%)	31 (100%)
Job tenure (years): mean (SD)	8.6 (6.7)
Pulmonary parenchymal lesions: n (%)	0 (0%)
Pleural lesions: n (%)	0 (0%)

1st evaluation value, estimated value that is the 95th percentile concentration of airborne toxic substances during working hours at all possible points in the work area; 2nd evaluation value, estimated arithmetic mean concentration of airborne toxic substances in the work area; Type B sampling value, concentration at the place and time when the exposure of workers was considered to be a maximum. ¹² , ¹³