"Severe insomniacs had a higher rate of absenteeism, missing work twice as often as did good sleepers.."
Medical and socio-professional impact of insomnia.
Sleep. 2002 Sep 15;25(6):625-9.
"Absenteeism is one major target in the evaluation of severe insomnia at the workplace…The economic impact is severe in term of direct and indirect costs."
Socioeconomic impact of insomnia in working populations.
Ind Health. 2005 Jan;43(1):11-9. Review.