Table 1.
Maternal and Infant Characteristics of Childhood Brain Tumor Cases and Matched Controls born in Washington State, 1991–2010
| Cases N (%) |
Controls N (%) |
|
|---|---|---|
| Maternal Characteristics | ||
| Maternal Smoking During Pregnancy | ||
| No | 214 (87) | 198 (80) |
| Yes | 31 (13) | 43 (17) |
| Unknown | 2 (<1) | 6 (3) |
| Maternal Education | ||
| 0 – 11 | 45 (18) | 50 (20) |
| 12 | 70 (28) | 68 (28) |
| >12 | 118 (48) | 108 (44) |
| Unknown | 14 (6) | 21 (8) |
| Maternal Age at Delivery | ||
| <20 | 18 (7) | 22 (9) |
| 20–24 | 69 (28) | 50 (20) |
| 25–29 | 65 (26) | 77 (31) |
| 30–34 | 53 (22) | 61 (25) |
| ≥35 | 42 (17) | 37 (15) |
| Infant Characteristics | ||
| Birth year | ||
| 1991–1994 | 72 (29) | 72 (29) |
| 1995–1999 | 94 (38) | 94 (38) |
| 2000–2004 | 56 (23) | 56 (23) |
| 2005–2010 | 25 (10) | 25 (10) |
| Sex | ||
| Male | 120 (49) | 120 (49) |
| Female | 127 (51) | 127 (51) |
| Race | ||
| White | 184 (74) | 184 (74) |
| Black | 9 (4) | 9 (4) |
| Asian | 17 (7) | 17 (7) |
| Other | 37 (15) | 37 (15) |
| Birthweight (grams) | ||
| 1105–<3175 | 45 (18) | 62 (25) |
| 3175–<3458 | 52 (21) | 61 (25) |
| 3458–<3770 | 76 (31) | 63 (25) |
| 3770–4847 | 74 (30) | 61 (25) |
| Gestational Age (weeks) | ||
| 25–38 | 52 (21) | 56 (23) |
| 39 | 65 (26) | 68 (27) |
| ≥40 | 129 (52) | 123 (50) |
| Unknown | 1 (<1) | 0 (0) |
| Size for Gestational Age | ||
| Small | 14 (6) | 23 (9) |
| Appropriate | 194 (79) | 197 (80) |
| Large | 38 (15) | 27 (11) |
| Unknown | 1 (<1) | 0 (0) |
| Season of birtha | ||
| Winter | 65 (26) | 54 (22) |
| Spring | 61 (25) | 67 (27) |
| Summer | 59 (24) | 46 (19) |
| Fall | 62 (25) | 80 (32) |
| Disease Characteristics | ||
| Age at CBT Diagnosis | ||
| <5 | 123 (50) | |
| ≥5 | 124 (50) | |
| Histological Type | ||
| PNET | 55 (22) | |
| Ependymoma | 22 (9) | |
| Astrocytoma | 170 (69) | |
| Aniplastic | 2 (<1) | |
| Glioblastoma NOS | 6 (2) | |
| Malignant Glioma | 77 (31) | |
| Fibrillary Astrocytoma | 4 (2) | |
| Astrocytoma NOS | 16 (7) | |
| Pleomorphic | 6 (2) | |
| Pilocytic | 59 (24) | |
a
Winter = December, January, February; Spring = March, April, May; Summer = June, July, August; Fall = September, October, November