Model AIC BIC logLik Test L.Ratio p-value  1 668.0160 754.6460 -314.0080       2 536.0836 627.0451 -247.0418 1 vs 2 133.9324 <0.0001  3 430.4238 525.7168 -193.2119 2 vs 3 107.6598 <0.0001  4 53.2419 152.8665 -3.62095 3 vs 4 379.1819 <0.0001

Table 1: Model selection criteria for corresponding LME models.