Pre-operative anaemia is associated with total morbidity burden on days 3 and 5 after cardiac surgery: a cohort study

Table 6 Median C-POMS score and hospital length of stay by quintile of Hb

Quintile	D3	D5	D8	D15	All time points	Hospital LOS
	Median [IQR]	Median [IQR]	Median [IQR]	Median [IQR]	B ^a (se)	Median [IQR]
1 (≤121)	5 [2–6] 90	3 [1–5] 87	4 [2–6] 54	4 [2–7.5] 20	0	10 [6–17.5] 88
2 (122–131)	4 [2–5] 93	2 [1–4] 90	3 [2–4] 43	3 [2–3] 7	−0.82 (0.29)	7.5 [6–11] 90
3 (132–138)	2 [1–5] 82	2 [1–3] 80	3 [1–4] 31	2 [2–6] 7	−1.34 (0.30)	6.5 [5–10] 82
4 (139–146)	3 [1–5] 89	2 [1–3] 82	3 [2–5] 29	3 [1–4] 6	−1.25 (0.29)	6 [5–9] 88
5 (>146)	2 [1–4] 85	2 [1–3] 78	3 [1–4] 19	2.5 [1.5–3] 4	−1.71 (0.29)	6 [5–8] 86
p value	<0.0001	0.007	0.28	0.67	<0.0001	<0.0001
p value (trend)	<0.0001	0.001	0.16	0.15	<0.0001	<0.0001

IQR inter-quartile range
^aDifference in C-POMS score for each quintile compared to quintile 1 after adjustment for day of follow-up