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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).