Sick - and in denial.
Up to 73 per cent have turned up at work unwell because they didn't want to get a bad name, were snowed under with work or feared it would harm their career prospects.
Workers in Scotland are most likely to fear for their promotion chances if they stay at home.
And 75 per cent of Scots say they have too much work to do to stay in bed.
The findings by market analysts TNS will surprise many who believe workers will use any excuse to call off sick or take a "duvet day".
But others will blame a growing bullying culture in offices which has led to staff being too frightened to take time off when they are ill.