Table 4. Odds ratio for 28-day mortality according to MAP group and previously measured blood pressure.

Subgroup	Unadjusted OR	95% CI	P	Adjusted OR	95% CI	P
Low previous BPb
MAP group 0a	2.10	(1.04–4.22)	0.037	1.56	(0.67–3.58)	0.293
MAP group 1	Ref			Base
MAP group 2	0.70	(0.43–1.16)	0.174	0.62	(0.35–1.08)	0.093
MAP group 3	2.23	(1.05–4.73)	0.036	2.42	(1.01–5.76)	0.046
High previous BPc
MAP group 0	5.67	(1.93–16.61)	0.002	3.71	(1.04–13.19)	0.042
MAP group 1	Ref			Base
MAP group 2	0.29	(0.16–0.53)	<0.001	0.32	(0.16–0.64)	0.001
MAP group 3	0.40	(0.20–0.80)	0.010	0.71	(0.30–1.68)	0.439

^a, group category: group 0, a-MAP <65 mmHg; group 1, 65 mmHg ≤ a-MAP <75 mmHg; group 2, 75 mmHg ≤ a-MAP <85 mmHg; group 3, a-MAP ≥85 mmHg; ^b, the average MAP of previously measured blood pressure was less than 85 mmHg; ^c, the average MAP of previously measured blood pressure was 85 mmHg or more. MAP, mean arterial pressure; OR, odds ratio; CI, confidence interval.