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) |