1. The average percentage of employees absent at any point in a calendar month, in the entire mine.
The average percentage of employees absent at any point in a calendar month, in the entire mine. Data were collected for 33 consecutive months from November 1997 to July Period 1 covers the 8-hour/7-day roster, period 2 covers the 12-month period after the change to the 12-hour/7-day roster, and period 3 covers the 12-month period after some employees changed to the 12-hour/5-day roster.
A Baker et al. Occup Environ Med 2003;60:43-49
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