Table 1.

Distribution of typical principal diagnoses and complaints (ICD-10) in older patients (aged≥80 years) admitted to a collaborative emergency department

Diagnosis (ICD-10)	Octogenarians n = 14,061		Nonagenarians n = 3708		All patients n = 17,769
Pneumonia (J18)	4.7%	1.	5.2%	3.	4.8%	1.
Malaise and fatigue (R53)	4.3%	2.	5.3%	2.	4.5%	2.
Heart failure (I50)	4.0%	4.	5.4%	1.	4.3%	3.
Atrial fibrillation (I48)	4.5%	3.	2.9%	7.	4.1%	4.
Cystitis (N30)	2.5%	7.	3.4%	4.	2.7%	5.
Head wound (S01)	2.4%	9.	3.3%	5.	2.6%	6.
Urinary tract infection, site not specified (N39)	2.4%	10.	3.2%	6.	2.5%	7.
Non-specific chest pain (R07)	2.5%	8.	2.3%		2.5%	8.
Unspecified disorientation (R41)	2.7%	6.	1.6%		2.4%	9.
Non-specific abdominal pain (R10)	2.9%	5.	2.4%		2.4%	10.
Intracranial injury (S06)	2.1%		2.9%	9.	2.3%
Pyelonephritis (N10)	2.1%		2.9%	9.	2.3%
Back pain (M54)	2.3%		2.5%		2.2%
Hip fracture (S72)	1.7%		2.9%	8.	1.9%