Table 4.

Feature selection in multiple regression models for seven hospitalization costs

Cost Category	Age	Marital status	Admission condition	Length of hospital stay	Initial treatment	Presence of other diseases	Transfer	Drug resistance	Admission department
Diagnostic cost	√		√	√	√	√	√
Medical service cost	√		√	√	√				√
Material cost	√		√	√	√		√		√
Treatment cost	√	√		√		√	√	√	√
Drug cost	√			√	√	√	√		√
Other cost	√	√	√	√	√		√		√
Total hospitalization cost	√		√	√	√		√	√	√