September 14, and most businesses resumed their work by the end of the month. The United States military ceased relief operations on September 19, though complete recovery was disrupted by the passage of several subsequent typhoons. These storms caused less damage than normal after Omar wrecked the more vulnerable structures. As a result, it became difficult to discern the damage between Omar and Typhoon Gay in December 1992. A 1993 study in the medical journal Anxiety found that 7.2% of 320 participants affected by Omar developed acute stress reaction, and another 15% developed early traumatic stress response, especially those affected by the later typhoons. About 5.9% of the participants displayed symptoms of posttraumatic stress disorder, similar to the levels shown after Hurricane Hugo in 1989. Due to the destruction in Guam, the name Omar was retired and was replaced with Oscar in 1993. See also Typhoon Rita (1978) Typhoon Andy (1982) Typhoon Herb Notes References External links Retired Pacific typhoons 1992 Pacific typhoon season Typhoons in Guam Typhoons in Taiwan Typhoons in China Typhoons in the Philippines Typhoon Omar Typhoon Omar Typhoons