1 by sex. Towns that registered the highest relative risks for both sexes were mostly located in the Provinces of Cadiz, Seville, Huelva, Barcelona and Almería. The highest-risk area in Barcelona Province corresponded to very specific municipal areas in the Bages district, e.g., Suría, Sallent, Balsareny, Manresa and Cardona. Conclusion Mining/industrial pollution and the risk entailed in certain occupational exposures could in part be dictating the pattern of municipal bladder cancer mortality in Spain. Population exposure to arsenic is a matter that calls for attention. It would be of great interest if the relationship between the chemical quality of drinking water and the frequency of bladder cancer could be studied."/>
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Table 1 Summaries of population and cancer mortality in the 8077 Spanish towns. Spain 1989–1998.

From: Municipal distribution of bladder cancer mortality in Spain: Possible role of mining and industry

  Total Mean Median Standard deviation Minimum Maximum No. (%) of areas with zero counts
Population 39648759 4908.85 586 42430.43 5 2866850 0 (0)
Observed bladder 34281 4.24 1 40.77 0 2543 3823 (47.3)
Expected bladder 34333 4.25 0.92 39.33 0.01 2721.16 0 (0)
Bladder SMRs1 - 0.76 0.39 1.19 0 26.32 3823 (47)
Observed lung 155014 19.19 3 190.03 0 12434 1905 (24.6)
Expected lung 155207 19.22 3.79 177.00 0.04 12243.54 0 (0)
Lung SMRs1 - 0.72 0.69 0.64 0 14.82 1905 (24.6)
  1. 1Descriptive values of the 8077 SMRs