Table 4.

Depression, yearly household income and length of post-operative hospital stay

Model	N	Mean length of stay (days)	HR	95% CI	p
No depression/high income	114	6.21	–	1 (Reference)	–
No depression/low income	102	7.78
Age and sex adjusted			0.788	0.599–1.036	.09
Fully adjusteda			0.801	0.606–1.058	.12
High depression/high income	41	6.63
Age and sex			0.735	0.505–1.071	.11
Fully adjusteda			0.810	0.540–1.215	.31
High depression/low income	53	8.32
Age and sex			0.547	0.389–0.770	< .01
Fully adjusteda			0.599	0.415–0.864	.01

^aFully adjusted model: smoking status, BMI, diabetes, chronic disease burden, cardiopulmonary bypass, number of grafts, EuroSCORE, antidepressant medication and anxiety.