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. 2015 Mar 19;2015:168682. doi: 10.1155/2015/168682

Table 2.

Variables removed from the dataset during the cleansing process.

Variable Explanation
Type Constant value
Nhistori Identifier
Otrosf 87% of missing values (additional medical information)
Creat Empty
p16 Empty
Otrosm 93% of missing values (additional medical information)
Fdiagn Date
Fecharec Date
Fechaprog Date
Fechametas Date
Fechmuerte Date
Fechaultre Date
filter_$ Constant value