Table 2. Analysis of Deviance table (Likelihood Ratio – LR – tests) for the binomial GLM with presence/absence of new attacks as response.

See also Fig. 6.

	LR	Df	p-value
Treatment	8.568	2	0.014
Year	0.094	1	0.759
Treatment x year	1.321	2	0.517
Spruce area within 100 m	7.952	1	0.005
Initial volume attacked	1.576	1	0.209

Note:

Spruce area and initial volume are square root transformed and centered on their mean.