Table 1

 Plant-specific data on the number of workers who participated in the monitoring by follow up year, and the number of subjects who participated in the longitudinal estimation by the regression analysis (that is, ⩾25 years of age with ⩾3 tests and ⩾5 years of follow up)

PlantNumber by follow up yearsSubjects ⩾25 years of age with ⩾3 tests and ⩾5 years of follow up
01234–56+nAge*Years†
*Mean age at the start of follow up.
†Mean years of follow up.
17774223592751249012036.88.51
299558348141834325533538.28.83
3231690178366640822240236.47.95
496655047744234125932634.67.92
5119276068460246834845835.18.43
615618016525082644325636.46.04
798063158453744636643837.48.81
887851040932322315721938.68.21
980240736231817410116739.77.77
10165556748741730824529639.98.47
116073082762401176011336.17.67
Total1272964405554474632162146313037.28.06