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Table 2 Association of dioxin exposure (modelled ground-level concentrations) with non-Hodgkin's lymphoma incidence (3974 cases, four administrative departments, 1990–1999, France)

From: Risk for non Hodgkin’s lymphoma in the vicinity of French municipal solid waste incinerators

  Regression coefficient Standard deviation P-value
  Univariate analysis
Dioxin exposure* 1.453 0.328 10-5
  Multivariate analysis
Dioxin exposure 0.925 0.459 0.04
Department    
   Isère - - -
   Bas-Rhin 0.094 0.042 0.03
   Haut Rhin 0.008 0.046 0.87
   Tarn -0.180 0.058 0.002
Log(industry × years) 0.022 0.011 0.05
S(log(population density)) - - 0.07
  1. * modelled ground-level concentrations
  2. reference category
  3. spline-smoothed log(population density) with 1.963 effective degrees of freedom.
  4. Neither a regression coefficient nor a standard deviation can be reported, as for any spline curve (divided by definition into many segments corresponding to the knots).