Forecasting the length-of-stay of pediatric patients in hospitals: a scoping review

Table 4 Pre-processing modeling approaches

Pre-processing modeling approaches	Reference
Pre-processing modeling approaches	[32]	[42]	[29]	[27]	[38]	[35]	[21]	[36]	[22]	[34]	[24]	[41]	[26]	[3]	[31]	[2]	[30]	[43]	[40]	[33]	[20]	[25]	[23]	[28]	[37]	[19]	[18]	[39]	Frequency
Logarithmic transformation						✔		✔			✔							✔		✔	✔	✔	✔	✔	✔				10
Coding of categoric variables											✔			✔		✔			✔			✔		✔	✔	✔			8
Colinearity test	✔							✔		✔								✔					✔	✔	✔	✔			8
Missing data treatment				✔							✔				✔	✔								✔		✔			6
Variable categorization			✔																✔	✔									3
Feature engineering														✔		✔										✔			3
Data rescaling		✔																										✔	2
Outliers withdrawn										✔													✔						2

ISSN: 1472-6963