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. 2015 Oct 8;15:206. doi: 10.1186/s12862-015-0476-0

Table 4.

Solution for random effects from models fitted with homogeneous among-year variance

Effect Variance (S.E.) −2 LogL χ 2 d.f. P
Null 3914.4
Year 37.720 (15.338) 3635.5 278.9 1 <.0001
Random intercept 4.612 (2.416) 3630.9 4.6 1 0.0319
Random slope 10.441 (3.374) 3611.8 19.1 2 <.0001
Residual error 23.767 (2.666)

A covariance term between individual intercepts and slopes is included in the Random slope-model, hence d.f. = 2