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Table 2 Frequency (and percentage) of UBOs among NF1 patients with or without OPG by 10-year age group

From: Serial MRIs provide novel insight into natural history of optic pathway gliomas in patients with neurofibromatosis 1

Age Group OPG Absent Any OPG Present Asymptomatic OPG Present
0 to 9.99 years 53/72 (73.6%) 17/18 (94%) 16/17 (94%)
10.0 to 19.99 years 57/119 (47.9%) 10/13 (77%) 4/6 (67%)
20.0 to 29.99 years 39/109 (35.8%) 3/8 (38%) 3/5 (60%)
30.0 to 39.99 years 21/80 (26.3%) 3/8 (38%) 2/5 (40%)
40.0 years and above 43/129 (33.3%) 3/4 (75%) 1/1 (100%)