Skip to main content

Table 2 Nomenclature table

From: Confidence-based laboratory test reduction recommendation algorithm

Symbol

Explanation

\(X\)

Input features (including laboratory values, vital signs, demographics, time differences in terms of hours, and observation indicators)

\(O\)

Observation indicator. It is included in input features\(X\). (If the laboratory sample is observed,\({o}_{t}=1\); otherwise, \({o}_{t}=0\))

\(T\)

The total number of timesteps. In a time sequence, a record of a laboratory group occurs at one timestep. The maximum number of timesteps is 30

\(P\)

The selection probability (If the Hgb is selected, \({p}_{t}=1\); otherwise, \({p}_{t}=0\))

\(Y\)

Normality label (If the Hgb value is above the LBNR, \({y}_{t}=1\); otherwise, \({y}_{t}=0\))

\(Z\)

Stability label (If the Hgb value does not transit from normal to abnormal, \({z}_{t}=1\); otherwise, \({z}_{t}=0\))

\(V\)

Hemoglobin value

\(\tau\)

The selection threshold. Its default value is 0.5. (If predicted selection probability \({p}_{t}>\tau\), the corresponding Hgb sample is selected as a candidate for reduction; otherwise, the Hgb sample is not a candidate for reduction)