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Table 1 Spearman correlation r s between standardized mortality ratios (SMRs) for suicide (2005–2009) and district characteristics

From: Geospatial examination of lithium in drinking water and suicide mortality

District characteristics Suicide SMR
  r s p-val.
Lithium level, mean (mg/l) −0.26 0.009 **
Population density (per km2) −0.35 0.000 ***
Per capita income (in 1,000 Euro) −0.47 0.000 ***
Proportion of Roman Catholics, % 0.37 0.000 ***
Unemployment rate, % −0.14 0.178
Psychiatrist density (per 10,000) −0.41 0.000 ***
Psychotherapist density (per 10,000) −0.49 0.000 ***
General practitioner density (per 10,000) −0.17 0.099
  1. Signif.: ‘***’ 0.001, ‘**’ 0.01, ‘*’ 0.05.