www.biomedcentral.com

Table 1
Correlation coefficient (r) from Pearson correlation analysis between cumulative salted fish consumption per capita (per kg) and age-standardized incidence and mortality rates in Hong Kong, 1991–2008
	(a) FAO commodity statistics
Year of cumulative salted fish consumption per capita	Age-standardized incidence rate		Age-standardized mortality rates
	Male	Female	Male	Female
0	0.700*	0.668*	0.627*	0.430
5	0.710*	0.704*	0.789*	0.611*
10	0.729*	0.674*	0.943*	0.622
	(b) Hong Kong trade statistics
Year of cumulative salted fish consumption per capita	Age-standardized incidence rate		Age-standardized mortality rates
	Male	Female	Male	Female
0	0.709*	0.762*	0.652*	0.502*
5	0.792*	0.830*	0.882*	0.729*
10	0.471	0.477	0.893*	0.395

* Significant at 0.05 level.

The cumulative salted fish consumption up to the specified time point was estimated by aggregating annual salted fish consumption per capita estimates in all years prior to that year up to 1991. (a) Cumulative salted fish consumption per capita was estimated from FAO commodity statistics on fish, dried, salted or smoked. (b) Cumulative salted fish consumption per capita was estimated from Hong Kong trade statistics on dried fish, whether or not salted but not smoked.

Lau et al.

Lau et al. BMC Cancer 2013 13:298 doi:10.1186/1471-2407-13-298

Table 1