The impact of care process development and comorbidity on time to surgery, mortality rate and functional outcome for hip fracture patients: a retrospective analysis over 19 years with data from the Swedish National Registry for hip fracture patients, RIKSHÖFT

Table 3 Mortality rate at 4-months follow-up

	TP 1	TP 2	TP 3	All	P-value
ASA
1–2	9.0	8.1	5.4	7.0	< 0.001
3–4	22.4	18.4	16.2	17.6	< 0.001
Age group
50–69	5.4	6.6	5.2	5.5	n.s
70–79	8.5	8.3	7.6	7.9	n.s
80–89	16.3	12.7	11.9	13.0	n.s
90+	24.2	27.1	22.0	23.3	n.s
Fracture type
Undisplaced, cerv	12.9	10.0	11.0	11.2	n.s
Displaced, cerv	15.5	12.3	12.2	12.9	n.s
Two-fragment, troch	15.9	15.5	12.5	14.3	< 0.05
Multi-fragmentary, troch	11.3	20.3	12.9	13.1	< 0.05
Days to surgery
0	14.8	15.5	11.2	13.0	n.s
1	13.8	11.6	12.6	12.7	n.s
2	13.2	14.2	11.6	12.5	n.s
3 or more	18.5	9.3	15.7	15.7	n.s

The table describes the mortality rate at 4-months for specific sub-groups as well as the relation between the three time periods (TP1 = Jan 1999-Sept 2003, TP 2 Oct 2003-Mar 2007, TP 3 = Apr 2007-Dec 2017). Days to surgery are defined as; 0 = operation within the same calendar day (date) as admission, 1 = operation within the first calendar day after admission (the next day), 2 = operation two calendar days after admission, ≥3 = operation three or more calendar days after admission. The p-value shows the statistical significant difference over time

ISSN: 1471-2474