Table 1.
Demographic and time variables that characterize glioblastoma and glioma case subjects and control subjects*
| Variable | Glioblastoma | Glioma | ||
|---|---|---|---|---|
| Case subjects | Control subjects | Case subjects | Control subjects | |
| Women | ||||
| No. | 109 | 216 | 197 | 391 |
| Age at blood collection, median (IQR), y | 41 (40–43) | 41 (40–42) | 41 (40–42) | 41 (40–42) |
| Age at glioma diagnosis, median (IQR), y | 57 (52–62) | — | 56 (48–60) | — |
| Time from blood collection to glioma diagnosis, median (IQR), y | 16 (9–21) | — | 15 (9–20) | — |
| Date of blood collection, median (IQR), calendar years | 1986 (1976–1989) | 1986 (1976–1989) | 1986 (1977–1989) | 1986 (1977–1989) |
| Date of birth, median (IQR), calendar years | 1945 (1936–1947) | 1945 (1936–1948) | 1946 (1939–1948) | 1946 (1939–1948) |
| Men | ||||
| No. | 265 | 524 | 397 | 786 |
| Age at blood collection, median (IQR), y | 42 (40–44) | 42 (41–44) | 42 (40–43) | 43 (40–43) |
| Age at glioma diagnosis, median (IQR), y | 56 (51–65) | — | 55 (49– 63) | — |
| Time from blood collection to glioma diagnosis, median (IQR), y | 15 (10–23) | — | 14 (9–21) | — |
| Date of blood collection, median (IQR), calendar years | 1983 (1974–1989) | 1983 (1974–1989) | 1985 (1974–1989) | 1985 (1974–1989) |
| Date of birth, median (IQR), calendar years | 1943 (1931–1948) | 1943 (1931–1948) | 1944 (1932–1948) | 1945 (1932–1948) |
| Total | ||||
| No. | 374 | 740 | 594 | 1177 |
| Age at blood collection, median (IQR), y | 42 (40–44) | 42 (40–43) | 41 (40–43) | 41 (40–43) |
| Age at glioma diagnosis, median (IQR), y | 57 (51–64) | — | 56 (49–62) | — |
| Time from blood collection to glioma diagnosis, median (IQR), y | 16 (10–22) | — | 15 (9–21) | — |
| Date of blood collection, median (IQR), calendar years | 1985 (1975–1989) | 1985 (1975–1989) | 1986 (1975–1989) | 1986 (1975–1989) |
| Date of birth, median (IQR), calendar years | 1944 (1931–1948) | 1944 (1931–1948) | 1945 (1934–1948) | 1945 (1934–1948) |
* Case subjects were blood donors (1974–2007) to Janus Serum Bank, Oslo, Norway, who were subsequently diagnosed with glioblastoma or glioma. Control subjects were individually matched to case subjects on 5-year age interval at the time of blood collection, sex, and date of blood collection. IQR = interquartile range; — = not applicable.