The influence of the group of indivduals with long and frequent illnesses of the general indice of sick-absenteeism.
D000041:Absenteeism; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000453:epidemiology*; D011044:Poland; D012737:Sex Factors; D012959:Socioeconomic Factors