About 80 percent of Connecticut police chases reported last year were called off early, according to a new UConn study. Researchers reviewed 396 pursuits reported by 68 departments. Sixteen percent ended in crashes, and seven percent involved injuries. Study co-author Ken Barone says the cancellation rate suggests officers are weighing risks under stricter statewide rules. Researchers caution that inconsistent reporting and missing information limit the findings. Thirty municipal departments submitted no records.