Table 1.

Results from the minimal adequate model (GLM with binominal error structure; AIC=102.93, d.f.=84) for survival in relation to the treatment (n(experiment)=42; n(control)=48), age class (n(young)=35; n(older)=54) and natural badge size. (Effect size d is calculated as the difference between the experimental and control groups; a negative value of d therefore indicates that the experimental group had a smaller value than the control group.)

response	predictor	likelihood ratio Χ2	p	effect size	95% CI
survival	treatment	Χ12=0.23	0.635	d=−0.100	−0.514 to 0.314
	age class	Χ12=3.26	0.071	r=0.190	−0.017 to 0.382
	natural badge size	Χ12=0.56	0.454	r=−0.080	−0.282 to 0.130
	treatment×age class	Χ12=6.11	0.014	d=−0.540	−0.962 to −0.118
	treatment×natural badge size	Χ12=8.56	0.003	d=0.648	0.223 to 1.073