ALERT Scale Calculation: Difference between revisions
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*Heart rate, respiratory rate, White Blood cell Count (WBC), systolic Blood Pressure (sBP) - are continuous data | *Heart rate, respiratory rate, White Blood cell Count (WBC), systolic Blood Pressure (sBP) - are continuous data | ||
The cut-off probability for '''R''' is 0.088 | The cut-off probability for '''R''' is 0.088 . "A cut-off point of 0.088, or a predicted probability of adverse outcome of 8.8%, was used to classify patients into two groups; high-risk and low-risk of adverse outcome." [[Bmjopen-2014-005501.ALERT_SCALE.pdf|from publication]] | ||
=== ADLs === | === ADLs === | ||
Revision as of 22:58, 22 December 2018
ALERT Scale Calculation
Binary logistic regression resulted in the following outcome model:
- LN(R/1-R) = Y
Y =
- -3.8390 + (0.1570 x male gender)
- +(0.0712 x Charlson Comorbidity Index)
- +(0.0532 x #ADLs
- -(0.1720 x Glasgow Coma Scale (GCS))
- +(0.0678 x age)
- -(0.0004 x (age x age)
- +(0.0175 x heart rate)
- +(0.0631 x respiratory rate)
- +(0.0289 x white blood cell count)
- -(0.0410 x systolic blood pressure)
- +(0.000121 x (systolic blood pressure x systolic blood pressure)
Where R is the risk of bad outcome and the categorical variable gender, is coded female=0 and male=1.
How to calculate R:
- R=exp(Y)/1 + exp(Y)
- Heart rate, respiratory rate, White Blood cell Count (WBC), systolic Blood Pressure (sBP) - are continuous data
The cut-off probability for R is 0.088 . "A cut-off point of 0.088, or a predicted probability of adverse outcome of 8.8%, was used to classify patients into two groups; high-risk and low-risk of adverse outcome." from publication
ADLs
ADL General Collection Information | Activity of Daily Living Score (ADLS)]])
- ' - Activity of Daily Living Score:
- 0 - independent
- 3 - minor dependence
- 6 - major dependence