The effect of a pre- and postoperative orthogeriatric service on cognitive function in patients with hip fracture: randomized controlled trial (Oslo Orthogeriatric Trial)

Table 5 Multiple linear regression model with the primary outcome at the four-month follow up control as the dependent variable (number = 228)

Variable	Unadjusted coefficients (95% CI)	P-value	Adjusted coefficients (95% CI)	P-value
Randomization group (reference: orthopedic ward)	1.8 (-5.9 to 9.5)	0.65	-2.5 (-7.1 to 2.2)	0.29
Admitted from nursing home	-44.5 (-50.8 to -38.2)	≤0.001	-25.0 (-31.1 to -18.8)	≤0.001
Age^a	-0.006 (-0.009 to -0.004 )	≤0.001	-0.002 (-0.003 to 0.000)	0.03
Gender (reference: male)	6.94 (-2.4 to 16.3)	0.14
Delirium during hospital stay^b	-31.7 (-38.3 to -25.0)	≤0.001	-11.7 (-17.1 to -6.3)	≤0.001
Number of years of higher education^c	2.17 (-0.19 to 4.16)	0.03
IQCODE >3.44^d	-42.3 (-47.9 to 36.7)	≤0.001	-23.4 (-29.4 to -17.5)	≤0.001
Preoperative waiting time^e	1.93 (-4.0 to 7.85)	0.52
APACHE II	-0.78 (-2.2 to 0.66)	0.29

R = 0.82. ^aAge squared; ^bnumber = 226; ^cnumber = 203; ^dIQCODE obtained during hospital stay (number = 222); ^enatural logarithm of preoperative waiting time. APACHE II, Acute Physiology and Chronic Health Evaluation II; IQCODE, Informant Questionnaire on Cognitive Decline in the Elderly.

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