Predicting Delirium Duration in Elderly Hip-Surgery Patients: Does Early Symptom Profile Matter?

Table 3

Generalised equation estimation (GEE) model for DRS items 1–13 for different lengths of delirium episodes until recovery (count of days). 𝑁=113 included observations.

	𝛽	SE	df	Wald 𝜒^2	95% CI	𝑃
DRS-R-98 item 6; Thought process abnormalities	−7.9𝐸−6	6.30𝐸−6	1	1.558	−2.03𝐸−5,4.5𝐸−6	0.21
DRS-R-98 item 9; Orientation	−6𝐸−6	8.88𝐸−6	1	0.456	−2.34𝐸−5,1.14 𝐸−5	0.50
DRS-R-98 item 10; Attention	−5.17𝐸−6	8.83𝐸−6	1	0.343	−2.25𝐸−5,1.21𝐸−5	0.56
DRS-R-98 item 11; Short-term memory	−1.08𝐸−6	9.67𝐸−6	1	0.012	−2.01𝐸−5,1.79𝐸−5	0.91
DRS-R-98 item 12; Long-term memory	1.45𝐸−5	7.20𝐸−6	1	4.044	3.67𝐸−7,2.86𝐸−5	0.04
DRS-R-98 item 13; Visuospatial impairment	8.86𝐸−6	1.16𝐸−5	1	0.580	−1.40𝐸−5,3.17𝐸−5	0.45
Constant	1.21	0.11	1	119.487	0.99, 1.42	0.000

SE: standard error, C.I.: confidence interval, 𝐸 with a minus sign signals the number of places the decimal point has to be moved to the left.