TAO has relatively high prevalence rate (34.7%) in three populations of Asian patients with GD. This is similar to that reported for Caucasian patients with GD. As in Caucasian patients, smoking increases the risk of TAO. In the Asian populations we studied, exophthalmos was the most common eye sign. However, lower lid retraction was also common and present in 60% of cases with other signs of TAO. In Chinese, Malay, and Indian Asians with GD, lower lid retraction should be a diagnostic criterion for TAO.
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