Most of these methods are general purpose and assume special structures in the continuous terms of the mathematical model.
The data were interrogated for the presence of a dose response relationship directly by examining continuous terms in opioid dose and duration regressed against the RA/CA ratio in both datasets.
Economic models which involve representing PA in categorical rather than continuous terms are commonplace.
To test for linear trends, covariates were included as continuous terms in the regression model.
cTests for dose-response trends were assessed by fitting ordinal variables as continuous terms in the Cox proportional hazards model.
Linear trend of renal cell cancer risk was tested among diabetic women using time since diagnosis as a continuous term (in month) in the model.
This study describes an atrial fibrillation (AF) detector whose structure is well-adapted both for detection of subclinical AF episodes and for implementation in a battery-powered device for use in continuous long-term monitoring applications.
When testing for linear trend, the quintile variable was coded with the median dietary value in each quintile and entered as a continuous term in the regression model to calculate p for trend.
The test for trend across deprivation quintiles was performed by determining the quintile-specific median values and entering that variable as a continuous term in the regression model.
