Table 1.

Selected characteristics of 1-year survivors of retinoblastoma^*

Characteristic	Total, No. (%)	Hereditary, No. (%)	Nonhereditary, No. (%)
Total no. of subjects	1854 (100)	1092 (100)	762 (100)
Laterality
Unilateral	817 (44.1)	55 (5.0)	762 (100.0)
Bilateral	1037 (55.9)	1037 (95.0)	0 (0.0)
Sex
Male	956 (51.6)	568 (52.0)	388 (50.9)
Female	898 (48.4)	524 (48.0)	374 (49.1)
Age at retinoblastoma diagnosis, y
<1	769 (41.5)	612 (56.0)	157 (20.6)
1	519 (28.0)	306 (28.0)	213 (28.0)
2	341 (18.4)	126 (11.5)	215 (28.2)
≥3	225 (12.1)	48 (4.4)	177 (23.2)
Vital status
Alive	1380 (74.4)	720 (65.9)	660 (86.6)
Deceased	423 (22.8)	346 (31.7)	77 (10.1)
Lost to follow-up	51 (2.8)	26 (2.4)	25 (3.3)
Calendar year of retinoblastoma diagnosis
1914–1949	181 (9.8)	106 (9.7)	75 (9.8)
1950–1959	301 (16.2)	201 (18.4)	100 (13.1)
1960–1969	508 (27.4)	311 (28.5)	197 (25.9)
1970–1979	448 (24.2)	254 (23.3)	194 (25.5)
1980–1989	300 (16.2)	171 (15.7)	129 (16.9)
1990–1996	116 (6.3)	49 (4.5)	67 (8.8)
Age at last observation, y
1–9	258 (13.9)	184 (16.9)	74 (9.7)
10–19	291 (15.7)	188 (17.2)	103 (13.5)
20–29	355 (19.2)	185 (16.9)	170 (22.3)
30–39	449 (24.2)	278 (25.5)	171 (22.4)
40–79	501 (27.0)	257 (23.5)	244 (32.0)
Family history of retinoblastoma
Yes	333 (18.0)	333 (30.5)	0 (0.0)
No	1196 (64.5)	575 (52.7)	621 (81.5)
Uncertain	325 (17.5)	184 (16.9)	141 (18.5)
Treatment
Surgery only	681 (36.7)	108 (9.9)	573 (75.2)
Radiation only	613 (33.1)	534 (48.9)	79 (10.4)
Radiation and chemotherapy	462 (24.9)	408 (37.4)	54 (7.1)
Radiation and unknown chemotherapy	16 (0.9)	14 (1.3)	2 (0.3)
Chemotherapy only	64 (3.5)	21 (1.9)	43 (5.6)
Uncertain	18 (1.0)	7 (0.6)	11 (1.4)
Any radiotherapy
Yes	1091 (58.8)	956 (87.5)	135 (17.7)
No	752 (40.6)	132 (12.1)	620 (81.4)
Uncertain	11 (0.6)	4 (0.4)	7 (0.9)

^*Percentages for some categories do not total 100 because of rounding.