Exact(7)
The tumour grade was categorised as low vs high (⩾50 vs <50% gland formation).
In the 20 29 year old category, grade was categorised as an ordinal variable.
Tumour grade was categorised as 'poor' (grade 3), 'not poor' (grades 1 and 2) and 'unknown' (grades 1, 2 and 3, implying good, moderate and poor differentiation, respectively).
Tumour grade was categorised into invasive grade 1, 2 and 3, and noninvasive, and tumour site grouped into central and noncentral.
Tumour grade was categorised as poorly differentiated (PD), moderately differentiated (MD), and well differentiated (WD) by two pathologists (SM and HJCS) independently.
Histologic grade was categorised into three groups: (1) Gleason Score 5 and 6; (2) Gleason Score 7 and (3) Gleason Score 8 10.
Similar(53)
Employment grades were categorised into three groups: administrative, professional, or executive; clerical; and other unskilled manual jobs.
Data on the grade of surgeon and anaesthetist was categorised into two groups: consultant grade or other (including all types of trainees and staff grade doctors).
Education was categorised into primary (grade 1-6), secondary (grade 7-9), higrade(grade 10-12) or Koranic education.
Level of education was categorised into grade/high school, college, or graduate school, except in two studies (Østerlind et al, 1988; Kirkpatrick et al, 1994) that included a category for technical school.
In 1990 the Old Maltings was categorised as a Grade II listed building.
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