Length of hospital stay after hip fracture and readmission rates of persons with and without Alzheimer’s disease: a matched cohort study

Table 2 Relative risk of 30-day and 90-day readmission in AD and non-AD cohorts after the acute care hospital stay

	n of Readmissions / n (%)	RR (95% CI) Unadjusted	RR (95% CI)^a	RR (95% CI) ^b
30-day Readmission
Non-AD Cohort (Ref.)	836 /6266 (13.3)	1.00	1.00	1.00
AD Cohort	672 /6266 (10.7)	0.78 (0.70–0.87)	0.78 (0.70–0.87)	0.76 (0.68–0.85)
90-day Readmission
Non-AD Cohort (Ref.)	1300/6266 (20.7)	1.00	1.00	1.00
AD Cohort	1059/6266 (16.9)	0.78 (0.71–0.85)	0.77 (0.71–0.85)	0.77 (0.70–0.84)

Abbreviations: AD Alzheimer’s disease; RR risk ratio; CI Confidence Interval; Ref. Reference
^a adjusted for age, sex, hospital district, and year of hip fracture
^b adjusted for age, sex, hospital district, diabetes, stroke, cardiovascular disease, mental disorders, highest occupational social class, duration of AD on hip fracture (in years), and required level of assistance at discharge.

ISSN: 1471-2318