Even my father, who spent 40 linear years as an orthodontist, recently founded his own travel business.
After observing the well-known ancient monuments of Rome and acknowledging its renowned historical personages, he was inspired to write the Cronica, a universal history of Florence in a strictly linear, year-by-year format.
Because the associations between years since baseline 2004 and BPRS dimensions were non-linear, years since baseline 2004 was included as a categorical variable (0, 1, 2-3 years).
However, we modelled the case and control log odds trajectories as linear from year two onwards by using control group responses measured at five years after baseline, so that the model effectively interpolated treatment group and control comparisons at year three.
Year of study —In this analysis, we used weighted regression to determine if the linear variable "year of publication" moderated the effect size of homework on outcome.
Neither was extrapolated, but their linear 10 year trends were used in sensitivity analysis, for estimating possible changes in model assumptions.
We adjusted for (maternal or paternal) age at first birth (using a linear term), year of first birth (using a linear term), education (stratified into: did not complete high school (low level), completed high school (14 years' education; medium), educated beyond high school (high)).
AS levels will survive, but will not count towards the full A-level which, he insists, must be taken as a "linear" two-year course, examined at its conclusion.
Adding a linear variable (years) to the regression did not change the R-square (0.88) and the significance (F test: 11.18) of the model.
