EAST HARTFORD, Conn. (AP) — An 11-year study of the incidence of brain cancer at jet engine manufacturer Pratt & Whitney in the state ended Thursday with university researchers saying they found no statistically significant elevations in the rate of cancer among workers.

Researchers at the University of Pittsburgh and the University of Illinois at Chicago said they identified 723 workers diagnosed with tumors between 1976 and 2004 at the United Technologies Corp. subsidiary. The tumors were malignant, benign or unspecified and included 277 cases of brain cancer.