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. 2012 Aug 8;7(8):e42309. doi: 10.1371/journal.pone.0042309

Table 5. Results from linear mixed-effects models on rate of forest loss.

A
Fixed effects: rate of forest loss ∼ mean elevation + time + income per capita + population density(AIC value = 2200)
Value Std. Error DF t-value p-value
Intercept 1.0807 0.1539 340 7.0184 0.0000
Mean elevation −0.0006 0.0001 340 −6.3430 0.0000
Time −0.3240 0.0974 323 −3.3253 0.0010
Income per capita 0.0001 0.0000 323 2.9992 0.0029
Population density 0.0011 0.0005 323 2.3181 0.0211
B
Fixed effects: rate of forest loss ∼ mean elevation + time + population density (AIC value = 2208)
Value Std. Error DF t-value p-value
Intercept 1.2199 0.1482 340 8.2297 0.0000
Mean elevation −0.0008 0.0001 340 −7.8899 0.0000
Time −0.1833 0.0865 324 −2.1191 0.0348
Population density 0.0017 0.0005 324 3.6614 0.0003

A) Fixed effects including all the variables. B) Fixed effects excluding income per capita. According to AIC values, the random intercept model was the optimal structure of the random component.