Table 1. The Age-adjusted Charlson Comorbidity Index (ACCI).

Age-comorbidity score	Estimated relative risk of death (99% confidence interval)
0	1.0
1	1.45 (1.25, 1.68)
2	2.10 (1.57, 2.81)
3	3.04 (1.96, 4.71)
4	4.40 (2.45, 7.90)
5	6.38 (3.07, 13.24)
6	9.23 (3.84, 22.20)
7	13.37 (4.81, 37.22)
8	19.37 (6.01, 62.40)