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Table 2 Results from "Home safety intervention" trial.

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

    

AIC

Model

b(Treat)

se

AIC

Difference

Rand Prac + MM

-0.0147

0.098

2724.86

0.00

Rand Prac + MM + N/S

-0.0098

0.098

2726.27

1.41

Rand Pract + MM + E/W + N/S

-0.0095

0.099

2728.27

3.41

Random practa

0.0015

0.140

2735.66

10.80

Random practice + N/S

0.015

0.140

2737.18

12.33

Robust se (pract as cluster)

-0.0278

0.136

2761.04

36.18

Ignoring clusteringb

-0.0278

0.076

2761.038

36.18

  1. LR test for random effect, model (a) vs model (b): chisquared 2(01) = 27.38 P = 0.0000