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Table 2 Correlations between the continuous baseline variables

From: Sleep duration and incidence of lung cancer in ageing men

  Smoking Alcohol Physical activity Body mass index Education HPL scores Sleeping hours
  (pack-years) (g/week) (kcal/d) (kg/m2) (years)   
Age (years) 0.002 (0.931) −0.106 (<0.001) 0.001 (0.990) 0.030 (0.129) −0.297 (<0.001) 0.074 (<0.001) 0.029 (0.138)
Smoking (pack-years) - 0.258 (<0.001) −0.184 (<0.001) −0.145 (<0.001) −0.080 (<0.001) 0.090 (<0.001) −0.043 (0.030)
Alcohol (g/week) - - 0.016 (0.418) 0.083 (<0.001) 0.116 (<0.001) 0.046 (0.021) −0.027 (0.177)
Physical activity (kcal/d) - - - 0.014 (0.467) 0.154 (<0.001) −0.085 (<0.001) −0.006 (0.750)
Body mass index (kg/m2) - - - - −0.056 (0.005) 0.051 (0.011) 0.039 (0.051)
Education (years) - - - - - −0.098 (<0.001) −0.064 (0.001)
HPL scores - - - - - - −0.056 (0.005)
  1. Values are given as Spearman’s correlation coefficient (p-values).
  2. Abbreviations: HPL Human Population Laboratory Depression Scale.