Table 1.

Demographic characteristics, presenting symptoms, and stage at diagnosis for children with unilateral and bilateral retinoblastoma

Unilateral (N = 109)Bilateral (N = 70)
Variables% (n/N)% (n/N)
Gender
 Females56 (61/109)52.9 (37/70)
Living condition during pregnancy
 Toilet available65.1 (69/106)68.7 (46/67)
 Running water available86.9 (93/107)88.1 (59/67)
 Dirt floor17.3 (18/104)10.4 (7/67)
Presenting symptom
 Strabismus50.5 (54/107)49.3 (33/67)
 Leukocoria80.4 (86/107)77.6 (52/67)
 Parental impression that child's vision was impaired25.2 (27/107)22.4 (15/67)
Deceased during follow-up11.6 (12/103)12.1 (8/66)
Lost to follow-up3.7 (4/109)4.3 (3/70)
IIRC groupN = 108N = 70
% (n)% (n)
 Group A0 (0)0 (0)
 Group B0 (0)1.4 (1)
 Group C2.8 (3)2.9 (2)
 Group D39.8 (43)40.0 (28)
 Group E57.4 (62)55.7 (39)
St. JudeN = 108N = 69
 O1.9 (2)0 (0)
 I1.9 (2)1.4 (1)
 II42.6 (46)55.1 (38)
 IIN26.9 (29)34.8 (24)
 III21.3 (23)5.8 (4)
 IV5.6 (6)2.9 (2)
ISSN = 108N = 69
 01.9 (2)0 (0)
 144.4 (48)55.1 (38)
 1N>027.8 (30)36.2 (25)
 24.6 (5)0 (0)
 315.7 (17)5.8 (4)
 45.6 (6)2.9 (2)
Mean ± SD (N)Mean ± SD (N)
Age at diagnosis (months)a27.70 ± 19.56 (107)14.57 ± 9.62 (67)
Lag time (months)6.73 ± 9.21 (107)7.54 ± 6.38 (67)
Maternal education (years of schooling)8.39 ± 3.59 (107)8.34 ± 4.45 (67)
Paternal education (years of schooling)8.46 ± 3.53 (97)8.88 ± 4.00 (60)
Monthly income (pesos)3796.40 ± 8224.49 (100)2,870.63 ± 2,327.08 (57)
Maternal age at delivery (years)26.13 ± 6.50 (107)26.48 ± 6.96 (67)
Length of commute from child's home to hospital (hours)4.73 ± 3.32 (97)4.98 ± 3.31 (62)
Follow-up time4.96 ± 3.41 (105)5.02 ± 3.10 (69)
  • aP = 0.001 from t test for difference in natural log-transformed variable between lateralities.