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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

From: Secular trends of salted fish consumption and nasopharyngeal carcinoma: a multi-jurisdiction ecological study in 8 regions from 3 continents

  (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
  1. * Significant at 0.05 level.
  2. 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.