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
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 | |||||