handle_impairment_group.RdThis function groups impairments (values 0-19) by the codebook definitions (visual, auditory/communicative, physical, intellectual/learning, psychological). This process
handle_impairment_group(x)An RSA-911 impairment (or cause) variable to be grouped.
The new variable with grouped character values Visual, Aud_Comm, Physical, Intell_Learn, and Psych, rather than values 0-19.