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Table 7 Comparison of models describing the per host net egg output

From: Density-dependent effects on the weight of female Ascaris lumbricoides infections of humans and its impact on patterns of egg production

Population Model type Model Test LRS d.f. p-value AIC
Baseline Negative binomial 1 - - - - 24679.09
   2 1 vs. 2 50.87 1 <0.0001 24630.21
   3 2 vs. 3 8.35 1 0.0039 24623.86
   4 3 vs. 4 0.02 1 0.89 24625.84
  Zero-inflated negative binomial 1I - - - - 23990.51
   2I 1 vs. 2 26.89 1 <0.0001 23965.62
   3I 2 vs. 3 0.41 1 0.52 23967.20
   4I 3 vs. 4 6.04 1 0.014 23963.17
    2 vs. 4 6.45 2 0.049  
1st re-infection Negative binomial 1 - - - - 14404.20
   2 1 vs. 2 44.42 1 <0.0001 14361.78
   3 2 vs. 3 4.06 1 0.044 14359.72
   4 3 vs. 4 4.50 1 0.025 14356.72
  Zero-inflated negative binomial 1I - - - - 14043.52
   2I 1 vs. 2 24.52 1 <0.0001 14020.97
   3I 2 vs. 3 0.25 1 0.62 14022.73
   4I 3 vs. 4 0.68 1 0.41 14024.04
2nd re-infection Negative binomial 1 - - - - 11050.10
   2 1 vs. 2 24.11 1 <0.0001 11027.99
   3 2 vs. 3 5.93 1 0.015 11024.06
   4 3 vs. 4 1.72 1 0.19 11024.33
  Zero-inflated negative binomial 1I - - - - 10715.26
   2I 1 vs. 2 7.24 1 0.0071 10710.02
   3I 2 vs. 3 0.22 1 0.65 10711.81
   4I 3 vs. 4 0.56 1 0.46 10713.26
  1. The goodness-of-fit of all NB and ZINB models fitted to the data assessed by the LRS and AIC. denotes the best-fit of each model type in each population. Model equations are given in Table 4.