Finally, we have analysed whether the likelihood of a move depends on the time already spent in the unskilled occupation by means of a set of dummy variables that identify durations in the unskilled occupation which are shorter than 1 year, between 1 and 5 years and longer than 5 years.
As the disease is quite rare and not readily identified, duration between symptoms and diagnosis can be several months to over a year.
Several other studies have also identified duration of tobacco use as a relevant factor [ 10– 15].
Analysis identified duration of screening sensitivity as a key variable that may be unavailable from clinical trials.
Both regression analyses identified duration of untreated psychosis and early changes in insight and psychopathology as predictors of good outcome (Tables 4 and 5).
Stepwise variable selection identified duration and peak frequency_1 as the most important variables for differentiating between chirps produced in response to different predator types.
The following three risk factors for catheter-related infections were identified: duration of catheterization, length of stay in ICU and manipulation of the stopcock.
Denote the start and end times of each identified duration by (tstarton, tendon) for Don and (tstartoff, tendoff) for Doff, respectively.
Stepwise regression analysis that included age, WC, SBP, duration of HD, WBC, adjusted-Ca, IP, β2MG, and TG identified duration of HD, β2MG and TG as significant and independent determinants of C1q.
After identifying duration of episode, we eliminated episodes lasting >60 days from further analysis because it was unlikely that these represented isolated bronchiolitis (see Additional file 1: Table S4).
