Table 2.

Distribution of the Charlson score one year before and after ICD-10 implementation

Charlson score	ICD-9	ICD-10	Difference
0	67.94	68.53	−0.59
1	15.41	14.90	0.51
2	8.98	9.00	−0.02
3	3.47	3.38	0.09
4	1.39	1.40	−0.01
5	1.89	1.96	−0.07
6+	0.92	0.83	0.11
Average Charlson score	0.64	0.63	0.01