Table 2.

Causes of death for liver and bile duct cancer in the 47 cohorts participating in the study (44 cohorts covered by Cancer Registry and three located in the province of Bologna) by calendar period.

	Causes of death for liver and bile duct cancer*
	44 cohorts, N=639				3 cohorts, N=59
	Cancer Registry, n (%)				HDR, n (%)
	<2000	2000-2009	2010-2019	Total	<2000	2000-2009	2010-2019	Total
Cases identified by record linkage	73 (22.8)	83 (44.9)	84 (62.7)	240 (37.6)	5 (17.2)	12 (60.0)	3 (30.0)	20 (33.9)
Cases not identified by record linkage	247 (77.2)	102 (55.1)	50 (37.3)	399 (62.4)	24 (82.8)	8 (40.0)	7 (70.0)	39 (66.1)

*ICD-8 codes: 155 and 156; ICD-9 codes: 155 and 156; and ICD-10 codes: C22, C23 and C24.

Abbreviations: HDR, Hospital Discharge Records.