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Table 1 Results from a Dummy CRCT.

From: Spatial effects should be allowed for in primary care and other community-based cluster RCTS

  AIC
Model k b(Treat)* se AIC Difference
Treat + Random District + N/S - 0.784 0.217 232.22 0
Treat + Random District + N/S + E/W - 0.748 0.212 232.27 0.05
Treat + Random District + MM + N/S 1 0.786 0.212 234.02 1.8
Treat + Random District + MM + N/S + E/W 1 0.748 0.212 234.27 2.05
Treat + Random District + MM 1 0.753 0.203 236.34 4.12
Treat + Random District - 0.491 0.262 247.86 15.64
Treat + N/S + E/W - 0.592 0.116 285.20 52.98
Treat + N/S + E/W using robust se   0.592 0.233 285.20 52.98
Treat + N/S - 0.613 0.117 287.65 55.43
Treat + N/S using robust se   0.613 0.246 287.65 55.43
Treat + robust se - 0.247 0.260 361.18 128.96
True value   0.693 - - -
  1. * expressed as loge(hazard ratio) in all models, including % sun exposed (perc_aff) as a covariate