Do coder characteristics influence validity of ICD-10 hospital discharge data?

Table 2 Mean number of coded diagnoses, procedures, complications, unspecified and Z codes by year, season, site and coder characteristics

Variable	Diagnoses	Procedures	Complications	Z codes	Codes ending in 8	Codes ending in 9
Total sample	4.3	1.3	0.2	0.6	0.4	0.7
Year (fiscal)
2002	5.2	1.4	0.3	0.7	0.5	0.8
2003	4.7	1.4	0.2	0.6	0.4	0.8
2004	4.1	1.3	0.2	0.5	0.3	0.7
2005	3.8	1.2	0.2	0.5	0.3	0.7
2006	3.9	1.3	0.2	0.6	0.3	0.6
Season
Jan-Mar	4.2	1.3	0.2	0.6	0.4	0.7
Apr-June	4.3	1.3	0.2	0.6	0.4	0.7
July-Sep	4.3	1.3	0.2	0.6	0.4	0.7
Oct-Dec	4.2	1.3	0.2	0.6	0.4	0.7
Site
A	3.9	1.3	0.2	0.3	0.5	0.8
B (tertiary)	5.0	1.5	0.3	0.6	0.5	0.7
C	3.8	1.2	0.1	0.7	0.3	0.5
D	3.9	1.1	0.1	0.5	0.3	0.7
Volume of coding
Low volume	4.3	1.3	0.2	0.5	0.4	0.6
High volume	4.2	1.2	0.2	0.6	0.3	0.7
Employment status
Part-time	4.0	1.4	0.2	0.7	0.3	0.6
Full-time	4.4	1.2	0.2	0.5	0.4	0.8

ISSN: 1472-6963