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Table 2 Results of the random forest showing the permutation variable importance measure (VIM) and ranking for the environmental 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 I3001 - I3010 Physical environment 25.49 1 9.2 1 6.87 2
I3017 - I3019 Social support 9.2 2 1.41 2 16.05 1
I3040 - I3070 Assistive devices 2.88 3 0.65 4 3.74 3
I3017-I3020 Personal assistance 1.14 4 0.33 5 0.86 5
I3035 Access to information 0.98 5 0.03 9 2.03 4
I6021 - I6027 Health care system 0.94 6 0.15 6 0.73 6
I3024 - I3034 Attitudinal environment 0.78 7 0.75 3 0.72 7
I3021 - I3023 Social network 0.26 8 0.05 7 0.2 8
I3013 Medication 0.13 9 0.04 8 0 9
Control variable   Capacity 87.42   24.24   26.09  
  Age 3.17   1.38   1.86  
  Gender 0.02   0   −0.05  
  Education 0.14   0.13   −0.32  
  Work 0.66   0.44   0.26  
   RMSE 7.43 5.08 9.46