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