Preliminary results showed that among 65+ years 15,714 acute medical admissions accounted for 37% of all acute adult hospital admissions. The median age was 78 years (q25-q75: 71-84 years) equally gender distributed. The admission rate was significantly higher in January and July (9%) and lower in April (7%) than the average months (p < 0.0001). Monday and Friday had the highest and Saturday and Sunday the lowest admission (16% vs 11%, p < 0.0001). 81% were admitted between 8 am. and 21 pm. Median length-of-stay was 2.7 days (q25-q75: 0.9 - 6.3 days). 44% were discharged within 48 hours and only 22% stayed for more than 1 week. 19% of the admissions were readmissions, 16% after a primary admission. There was a significant lower readmission rate after short versus long (<> 48 hours) primary admissions (13% vs. 18% p < 0.0001). Increased risk for readmission was also related to gender and month of admission, but not to the patient's municipal, triage, age, diagnosis, hospital, department shifts, weekday, or time of primary admission.