Table 3.

Depression symptom categories and length of post-operative hospital stay

Model	Depression symptom level	HR	95% CI	p
Total BDI score
Age and sex adjusted	None	–	1 (reference)	–
	Mild	0.726	0.552–0.955	.02
	Moderate to severe	0.519	0.300–0.899	0.02
Cognitive BDI score
Age and sex adjusted	Low	–	1 (reference)	–
	Medium	0.762	0.577–1.008	.06
	High	0.701	0.525–0.935	.02
Somatic BDI score
Age and sex	Low	–	1 (reference)	–
	Medium	0.906	0.693–1.185	.47
	High	0.753	0.563–1.008	.06