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. Author manuscript; available in PMC: 2016 Apr 11.
Published in final edited form as: Nutr Cancer. 2015 Aug 28;67(7):1120–1130. doi: 10.1080/01635581.2015.1073757

Table 1.

Demographic variables that characterize high grade1 and total glioma case and control study participants2

High Grade Glioma (Anaplastic Astrocytoma (n=31) and Glioblastoma (n=372))
Variable Cases Controls
Number 403 756
Percent men, IQR3 70 (65, 74) 70 (67, 73)
Median age in years at blood collection, IQR 42 (40, 43) 42 (40, 43)
Median age in years at glioma diagnosis, IQR 57 (50, 65) ---4
Median years from blood collection to diagnosis, IQR 15 (9,21) ---
Median year of blood collection, IQR 1985 (1975, 1989) 1986 (1975, 1989)
Median year of birth, IQR 1944 (1932, 1948) 1945 (1932, 1948)

Total Glioma
Number 592 1112
Percent men, IQR 67 (63, 71) 67 (64, 70)
Median age in years at blood collection, IQR 41 (40, 43) 41 (40, 43)
Median age in years at glioma diagnosis, IQR 56 (49, 63) ---
Median years from blood collection to diagnosis, IQR 15 (9,21) ---
Median year of blood collection, IQR 1986 (1975, 1989) 1986 (1975, 1989)
Median year of birth, IQR 1945 (1934, 1948) 1945 (1934, 1948)
1

Anaplastic astrocytoma and glioblastoma

2

Case study participants were blood donors (1974–2007) to the Janus Serum Bank, Oslo, Norway who were subsequently diagnosed with high grade or other histologic subtypes of glioma. Control participants were individually matched to case participants on date of blood collection, 2-year age interval at blood collection, and sex.

3

IQR =Interquartile range

4

--- Not applicable