Sentence examples for before the reference year from inspiring English sources
The effect of age class structure of a forest landscape resulting from past practices and disturbances before the reference year 1990 should be excluded, but methods for "factoring out" the effects of this age class legacy on carbon emissions and removals are lacking.
Current use of bisphosphonates was defined as use in the year before the reference year, and former users had taken bisphosphonates at any time before this period.
Reference populations were defined as all the individuals (or only females for sheep and cattle breeds, given the small number of males raised in these species) with both parents known, born during a generation interval period before the reference year.
To be able to identify program use both before and after the reference year (2003-04), service use data from 2002-03 to 2005-06 were included.
Usual dietary intake during the reference year (calendar year before diagnosis for cases or before selection into the study for controls) was assessed using a 74-item food frequency questionnaire (FFQ) that was adapted from the Block Health History and Habits Questionnaire [ 18].
The reference year was 2008.
The reference year was 2006.
The reference year is 2003.
In order to define the reference populations, generation intervals (T) were computed in the four pathways (see below), as the average age of parents when their useful offspring are born (i.e. offspring, which in turn become parents) over a 10 year period before a reference year (2005 for dog breeds (see [ 10]), and 2007 for sheep, cattle and horse breeds).
Mean observation in the EMR was similar for both groups with approximately 16 years before the reference date and 6 7 years after the reference date.
