Time trends in socioeconomic differences in incidence rates of cancers of gastro-intestinal tract in Finland

BMC Gastroenterology

Table 2 Standardized Incidence Ratio of stomach non-cardia, cardia, colon and rectum cancer

Cancer site	Stomach cancer (non-cardia)		Cardia cancer		Colon cancer		Rectum cancer
	Obs	SIR 95% CI	Obs	SIR 95% CI	Obs	SIR 95% CI	Obs	SIR 95% CI
MEN
Social class I	280	0.67 0.59–0.75	54	0.69 0.52–0.90	394	1.37 1.24–1.51	256	0.98 0.86–1.10
Social class II	957	0.86 0.81–0.92	169	0.84 0.72–0.98	823	1.14 1.07–1.22	736	1.10 1.03–1.19
Social class III	2740	1.06 1.02–1.10	491	1.07 0.98–1.17	1513	0.93 0.88–0.98	1488	0.98 0.93–1.03
Social class IV	884	1.20 1.12–1.27	149	1.19 1.01–1.39	332	0.78 0.69–0.86	375	0.92 0.83–1.02
WOMEN
Social class I	184	0.82 0.71–0.94	9	0.51 0.23–0.97	273	1.13 1.00–1.27	192	1.10 0.95–1.26
Social class II	804	0.94 0.88–1.01	59	0.88 0.67–1.14	1007	1.11 1.04–1.18	699	1.06 0.98–1.14
Social class III	1620	1.05 1.00–1.10	130	1.06 0.89–1.25	1467	0.94 0.89–0.99	1138	0.98 0.93–1.04
Social class IV	600	1.03 0.95–1.11	55	1.19 0.90–1.55	522	0.92 0.85–1.01	390	0.92 0.83–1.01

Stomach non-cardia, cardia, colon and rectum cancer cases among Finnish men and women aged 45–64 at beginning of each five-year follow-up period, and standardized incidence ratios (SIR) with 95% confidence intervals (CI) in 1971–95, by social class and period. Reference: economically active Finnish population.

ISSN: 1471-230X