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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: J Evol Biol. 2011 Oct 24;25(1):38–53. doi: 10.1111/j.1420-9101.2011.02401.x

Table 7.

Cox proportional hazard analyses for differences in larval survival in Cephaloleia beetles reared on native and novel host plants. N = the number of families.

Beetle species Log-likelihood χ2 N P
Cephaloleia belti (Generalist)
 Host plant −2501.1 35.21 36 <0.0001
 Family −2492.0 18.11 36 <0.0001
 * Family × Host −2492.04; −2492.29 0.49 36 0.78
Cephaloleia dilaticollis (Generalist)
 Host plant −6719.5 14.04 30 0.0008
 Family −6685.3 68.34 30 <0.0001
 * Family × Host −6685.3; −6691.6 12.49 30 0.0019
Cephaloleia dorsalis (Specialist)
 Host plant −2728.6 5.44 35 0.0196
 Family −2711.6 33.99 35 <0.0001
 * Family × Host −2711.6; −2712.4 1.53 35 0.2158
Cephaloleia placida (Specialist)
 Host plant −3404.4 17.352 38 0.0002
 Family −3361 86.83 38 <0.0001
 * Family × Host −3361.0; −3361.9 1.87 38 0.3924
*

Log-likelihoods for model comparisons between the model without Family × Host

interaction and the model including the interaction term.