Low intensity vibration exposure in postmen.

The complaints of white fingers in postmen who had used motorbikes and had been exposed to low intensity vibration were studied. Their vibration exposure was found to be 1-3 m/s2 per day, four hour equivalent value of frequency weighted acceleration. The rate of white fingers among all subjects was 2.8%. The rate was related not only to vibration/cold exposure but also to age and delivery area locations. The major part of the white finger occurrence reported here was considered to be due to primary Raynaud's syndrome, and it seems safe to conclude that, a daily vibration exposure of up to 2.5-3 m/s2 (4 h equivalent value) has not caused white fingers in this population.