"index derivation" is correct and usable in written English.
You can use this term when you are referring to the process of deriving an index in statistics or other fields. For example: "This paper presents an index derivation process to measure consumer confidence."
The standard method for Dst index derivation reported by Sugiura and Kamei (1991) and the internal/external field separation technique introduced in the last section were utilized.
With regards to potential hyperemia-induced changes in PCWP and their effect on physiologic index derivation, we recognize that such changes may proportionally have a greater effect on the transpulmonary pressure gradient than changes in systemic venous pressures would have on the gradient across the higher-pressured systemic circulation.
Finally, we assessed the performance of each Charlson index derivation during each year of follow-up.
There was also a significant interaction with the consultation rate (likelihood ratio test p<0.0001) with excellent discrimination of each Charlson index derivation when the number of consultations in the prior year was below 14, and good discrimination above 14 consultations in the prior year (table 4).
Each Charlson index derivation had a good discrimination for each of the 10-year age bands younger than 70 years, fair discrimination for each of the 10-year age bands up to 90 years, but was poor at discriminating for those who were older (table 4).
Likelihood ratio testing cannot be used, as models with the different Charlson index derivations are not nested within each other.
We found larger differences in the performance of the Charlson index derivations when adjusting for comorbidity-associated mortality in specific disease situations.
20 22 We used a Cox proportional hazards model adjusted for age and gender to compare the ability of each of the Charlson index derivations to adjust for the effect of comorbidity on 1-year survival.
Temperature did not vary with intra-SPA sensor position (0.010±0.009 v 0.010±0.009°C; distal v proximal; p = 0.1), supporting Tmn use in lung for the purpose of hemodynamic indices derivation.
We demonstrate for the first time that despite the pulmonary circulation's close proximity to air, there is no temperature gradient along the pulmonary artery, supporting the use of thermodilution as a surrogate marker of pulmonary blood flow in this model for the purpose of pulmonary hemodynamic indices derivation.
Step 3: Index entropy derivation.
