Table 1.

Characteristics of cases and controls in the Australian study of childhood brain tumors 2005–2010

CaseControl
3351,363
Supplied demographic datan (%)n (%)
Child's sex
 Female138 (41.2)643 (47.2)
 Male197 (58.8)720 (52.8)
Age group of child at diagnosis or recruitment
 0—135 (10.4)144 (10.6)
 2—495 (28.4)422 (31.0)
 5—9101 (30.1)444 (32.6)
 10–14104 (31.0)353 (25.9)
Child's year of birth group
 1990–199791 (27.2)332 (24.4)
 1998–2003139 (41.5)679 (49.8)
 2004–2010105 (31.3)352 (25.8)
Child's state of residence
 New South Wales/Australian Capital Territory114 (34.0)404 (29.6)
 Victoria/Tasmania97 (29.0)378 (27.7)
 South Australia/Northern Territory20 (6.0)111 (8.1)
 Western Australia44 (13.1)148 (10.9)
 Queensland60 (17.9)322 (23.6)
Child's year of diagnosis or recruitment
 2005–2006115 (34.3)617 (45.3)
 2007–2008116 (34.6)392 (28.8)
 2009–2010104 (31.0)354 (26.0)
Maternal age group
 ≤2455 (16.5)134 (9.9)
 25–34205 (61.4)843 (62.3)
 35+74 (22.2)376 (27.8)
Maternal Education
 Did not complete secondary school83 (24.9)305 (22.6)
 Complete secondary or trade qualification114 (34.2)463 (34.2)
 University or college136 (40.8)584 (43.2)
Household Income (AUD/annum)
 Up to $40, 00057 (17.3)226 (16.9)
 $40,001–$70,00091 (27.7)359 (26.9)
 $70,001–$100,00083 (25.2)350 (26.2)
 >$100,00098 (29.8)400 (30.0)
Birth order
 1150 (45.0)557 (40.9)
 2109 (32.7)483 (35.5)
 3+74 (22.2)321 (23.6)
Gestation (prematurity)
 Term (37+ weeks)292 (89.3)1003 (91.5)
 Preterm (<37 weeks)35 (10.7)93 (8.5)
Ethnicity
 European210 (62.7)1023 (75.1)
 At least 50% European76 (22.7)203 (14.9)
 At least 50% nonEuropean and unknown if 50% European15 (4.5)59 (4.3)
 Indeterminate34 (10.1)78 (5.7)
Multiple birth
 No322 (96.7)1317 (96.7)
 Yes11 (3.3)45 (3.3)
Birth defect
 No289 (95.4)903 (96.0)
 Yes14 (4.6)38 (4.0)
Folic acid data source (exposure questionnaire)
 Written questionnaire301 (90.9)939 (69.8)
 Phone interview30 (9.1)407 (30.2)

AUD: Australian Dollar