Indirectly estimated absolute lung cancer mortality rates by smoking status and histological type based on a systematic review

Table 1 Substitute years and countries used

Source of epidemiological data		Substitute data taken from WHO database
Country	Years^a	Country^b	Year^c	ICD codes^d
Brazil	1991	Brazil South	-	-
China	1978–1987	-	1988
	1988 onwards	China, selected urban and rural areas	-	C028^e
Finland	1944–1951	-	1952	-
Germany^f	1936	West Germany	1952	-
Hungary	1953	-	1955	-
Poland	1956	-	1959	-
Uruguay	1991–1995	-	1990	-
USA	1941–1949	-	1950	-
UK	1948	-	1950	-

^a For case-control studies, this is the midpoint of the years of the study. For other studies, it is the midpoint of the years of the baseline phase, plus f × years of follow-up where the survival factor f is taken as 0.45, 0.425, 0.40, 0.375, 0.35, 0.325 or 0.30 for, respectively, follow-up periods of 1–10, 11–15, 16–20, 21–25, 26–30, 31–35 and 36–40 years. If the follow-up period differs by smoking status, the value relevant to ever smoking is used.
^b Dash indicates that the country for which WHO data were extracted is the same as the country from which the epidemiological data came.
^c Dash indicates that the year for which WHO data were extracted is the same as the year for which the epidemiological data were relevant.
^d Dash indicates that the ICD codes used are A050 for the 6^th and 7^th revisions, A051 for the 8^th, B101 for the 9^th and C33–C34 for the 10^th, corresponding throughout to malignant neoplasm of the trachea, bronchus and lung. ICD = International Classification of Diseases.
^e Additionally includes carcinoma in situ.
^f For post-war/pre-unification epidemiological data, WHO data were extracted for East or West Germany as appropriate to the area where the study was conducted. For 1991 onwards, WHO data for unified Germany were extracted.

ISSN: 1471-2407