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

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

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
Agea -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 stayb -31.7 (-38.3 to -25.0) ≤0.001 -11.7 (-17.1 to -6.3) ≤0.001
Number of years of higher educationc 2.17 (-0.19 to 4.16) 0.03   
IQCODE >3.44d -42.3 (-47.9 to 36.7) ≤0.001 -23.4 (-29.4 to -17.5) ≤0.001
Preoperative waiting timee 1.93 (-4.0 to 7.85) 0.52   
APACHE II -0.78 (-2.2 to 0.66) 0.29   
  1. 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.