Table 2.

Severity of Graves' ophthalmopathy in different studies

	Uretsky13	Young14	Gruters15	Present study
Age of onset (range in years)	1–17	5–20	Not mentioned	2–16
Number of cases	23	33	43	83
Abridged classification
Class 0	11 (47.8%)	17 (51.5%)	24 (55.8%)	31 (37.3%)
Class 1	8 (34.8%)	12 (36.4%)	16 (37.2%)	24 (28.9%)
Class 1	8 (34.8%)	12 (36.4%)	16 (37.2%)	19 (22.9%)
Class 2	3 (13.0%)	3 (9.1%)	0	12 (14.5%)
Class 3	1 (4.3%)	1 (3.0%)	3 (7.0%)	4 (4.8%)
Class 3	1 (4.3%)	1 (3.0%)	3 (7.0%)	7 (8.4%)
Class 4	0	0	0	1 (1.2%)
Class 5	0	0	0	11 (13.3%)
Class 6	0	0	0	0