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Table 3 Results of the random forest showing the permutation variable importance measure (VIM) and ranking for aspects the physical environment as predictors of performance. Data Source: Model Disability Survey, Bankim Health District, Cameroon, 2016

From: Identifying key environmental barriers experienced by persons with mild, moderate, or severe disability in Bankim Health District, Cameroon: a policy-targeted secondary analysis of data obtained with the World Bank and WHO model disability survey

  MDS-Code Variable Total sample Moderate and severe disability No and mild disability
VIM Rank VIM Rank VIM Rank
Environmental factor: physical environment I3006 Transportation 5.46 1 0.64 5 4.89 1
I3008 Toilet of your dwelling 5.4 2 4.52 1 0.03 8
I3007 Dwelling 3.62 3 3.44 2 0.49 4
I3010 Lighting, noise, crowds 2.79 4 0.16 8 1.86 2
I3009 Temperature, terrain, climate 2.31 5 0.93 4 0.13 7
I3001 Workplace or education institution 1.94 6 0.06 9 1.4 3
I3003 Places for socializing and community activities 1.8 7 0.34 6 −0.06 10
I3005 Places of worship 1.68 8 1.45 3 0.15 5
I3002 Health facilities 0.82 9 0.02 10 0.02 9
I3004 Shop, banks, post office 0.71 10 0.24 7 0.15 6
Control variable   Capacity 82.4   21.91   29.06  
  Age 2.62   1.51   1.89  
  Gender −0.09   −0.01   − 0.43  
  Education − 0.06   0.15   −1.63  
  Work 0.78   0.34   0.49  
   RMSE 7.85 5.1 10.16