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Table 1 Results of the GLMM

From: Seasonal and inter-annual variation of malaria parasite detection in wild chimpanzees

Term Estimate SE χ 2 Df P
(Intercept) − 3.442 3.291    a
Sex 0.626 0.387 2.771 1 0.096
Agee − 0.691 0.249 8.082 1 0.004
Collection datee 0.075 1.969 0.001 1 0.970
Sampling period 2b 1.531 2.149 43.657 3 < 0.001c
Sampling period 3b 1.862 3.645    
Sampling period 4b − 0.928 5.163    
Collection date (sin) − 0.353 0.227 9.240 2 0.010d
Collection date (cos) 0.707 0.290    
Collection timee 0.165 0.161 0.945 1 0.331
  1. aNot indicated due to having a very limited interpretation
  2. bDummy coded with Sampling period 1 (2005–2006) as the reference category
  3. cThe indicated test refers to the overall effect of Sampling periods
  4. dThe indicated test refers to the overall effect of Seasonality
  5. ez-transformed to a mean of zero and standard deviation of one; mean (sd) of original variables were 17.7 (13.1) years (age), 2011-05-26 (1307) days (collection date), and 10.9 (2.9) h (collection time), respectively