OBJECTIVES: Aim of our study is to analyse the 30 days mortality of patients over 60 with femoral neck fracture according to comorbidities at admission. METHODS: Data derives from the database of National Health Insurance Fund Administration and based on the S7200 code (femoral neck fracture) of International Classification of Diseases (ICD) tenth revision and the codes of comorbidities. The retrospective study is based on patients discharged in 2000 from the institutions providing definitive care after the primary treatment of femoral neck fracture. Financial data has been controlled with a nationwide institutional questionnaire. We calculated 30 days mortality as a time between hospital admission and death. Early mortality rates are presented according to the dominant occurrence most frequently found comorbidities. RESULTS: Altogether 3783 patients over 60 years met the inclusion criteria. The overall 30 days mortality was 9%. The mortality of patients with comorbidities was 9.65%, while without comorbidities it was 2.1%. The early mortality rate was the following in case of the most common comorbidities: Mental and behavioural disorders (F00-F99) 16.1%; Malignant neoplasms (C00-C97) 18.9%; Diabetes mellitus and other disorders of glucose regulation and pancreatic internal secretion (E10-E16) 10.4 %; Extrapyramidal and movement disorders (G20-G26) 14.3%; Cerebrovascular diseases (I60-I69) 11.8%; Ischaemic heart diseases (I20-I25) 11.3%; Other forms of heart disease (I30-I52) 28.1%; Hypertensive diseases (I10-I15) 8%; decubitus ulcers (L89) 23%; Atherosclerosis (I70) 14.1%; Acute upper and lower respiratory infections (J00-J22) 43.9%; Chronic lower respiratory diseases (J40-J47) 14.3%. CONCLUSIONS: The presence of comorbidities increases the chance for mortality. In order to decrease the risk of mortality, one has to treat the comorbidities also. The coexistence of several comorbidities, multiplies the chance of mortality. The mortality values after femoral neck fractures reveals the necessity of comorbidities' treatment emphasizing the importance of postoperative interdisciplinary cooperation.