Table 1

Characteristics of carpenter cohort; values are number (%) except for age

Characteristic
*Age at time of first observation.
†Count changed over period of observation as some apprentices became journeymen; therefore distribution of hours reported.
Gender
    Male5110 (99.5)
    Female15 (0.29)
    Unknown12 (0.23)
Age in years*
    Mean (range)32.7
    Median31
    Range18–71
Hours worked by union status†
    Apprentice3160230 (33.8)
    Journeymen6047468 (64.7)
    Missing138905 (1.5)