Skip to main content

Table 1 Demographic characteristics of mothers

From: A case–control study of sporadic retinoblastoma in relation to maternal health conditions and reproductive factors: a report from the Children’s Oncology group

  Controls Unilateral cases Bilateral cases
Characteristics (N = 146) (N = 185) (N = 95)
  N (%) N (%) N (%)
Mother’s race    
 White non-Hispanic 111 (76) 105 (56.8) 66 (69.5)
 Black non-Hispanic 5 (3.4) 14 (7.6) 3 (3.2)
 Hispanic 18 (12.3) 46 (24.9) 12 (12.6)
 Other 12 (8.2) 20 (10.8) 14 (14.7)
Mother’s educational attainment    
 Less than High school 6 (4.1) 15 (8.1) 9 (9.5)
 High school graduate 15 (10.3) 32 (17.3) 13 (13.7)
 Some college or other training 26 (17.8) 40 (21.6) 16 (16.8)
 College graduate or more 99 (67.8) 98 (53.0) 57 (60.0)
Mother’s age at child’s birth    
  < 25 20 (13.7) 31 (16.8) 17 (17.9)
 25–29 45 (30.8) 59 (31.9) 25 (26.3)
 30–34 58 (39.7) 61 (33.0) 29 (30.5)
 35–39 21 (14.4) 26 (14.1) 21 (22.1)
 40+ 2 (1.4) 8 (4.3) 3 (3.2)
Total household income    
 Less than $35,000 29 (19.9) 56 (30.3) 27 (28.4)
 $35,000–50,000 19 (13.0) 18 (9.7) 11 (11.6)
 $50,000–75,000 30 (20.6) 30 (16.2) 18 (19.0)
 More than $75,000 60 (41.1) 62 (33.5) 32 (33.7)
 Refused/do not know 8 (5.5) 19 (10.3) 7 (7.4)
Mother smoked in the month before or during pregnancy  
 Yes 17 (11.6) 42 (22.7) 19 (20.0)
 No 127 (87.0) 142 (77.2) 75 (78.9)
 Missing 2 (1.4) 1 (76.8) 1 (1.1)