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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Stroke. 2010 Aug 26;41(10):2236–2238. doi: 10.1161/STROKEAHA.110.578252

Table 3.

Regression equations for the whole sample. These can be used to calculate the probability that the variable of interest falls within a certain range of values.

Proportion of patients less than or equal to a value for
AGE: PAGE= 1-exp(−.0017*1.09AGE)
NIHSS: PNIHSS = .23 + .22*ln(NIHSS +1)
OTT: POTT = −.07+(−.15)*ln(OTT)+.07*ln(OTT)2+(−.005)*ln(OTT)3
Proportion of patients less than or equal to a value for all three variables (PALL): = PAGE* PNIHSS* POTT
To determine the proportion of patients falling within a range of values for a variable subtract PALL for values below the minimum of the range from PALL for the maximum value of the target range.