Median number of days away from work, by event or exposure leading to occupational injury or illness, 2001 Event or exposure Median days Repetitive motion 18 Fall to lower level 11 Transportation accidents 10 Overexertion 7 Fall on same level 7 Slip, trip, loss of balance (without fall) 6 Fires and explosions 5 Assaults and violent acts by persons 5 Contact with objects and equipment 4 Exposure to harmful substances 3