Table 3. Correlation matrix between PWD occurrence and anthropogenic factors.

	Distance to road	Distance to rail	Distance to building	Distance to harbor	Distance to forest road	Distance to pine tree handling facility	No. of infected dead trees
Distance to road	1.0000
Distance to rail	0.0667*	1.0000
Distance to building	0.3726*	−0.0249*	1.0000
Distance to harbor	−0.2518*	−0.0352*	−0.1465*	1.0000
Distance to forest road	−0.0281*	−0.0845*	−0.0479*	−0.0043*	1.0000
Distance to pine tree handling facility	−0.0139*	0.0033*	−0.0500*	0.1061*	0.1954*	1.0000
No. of infected dead trees	0.3174*	0.0608*	0.2499*	−0.8269*	−0.0103*	−0.0865*	1.0000

Values with asterisk indicate a significant correlation at the 0.05 level.