Table 1 Completeness and accuracy of cause of injury E codes, Emergency Department Injury Surveillance System (EDISS), Massachusetts, March 1999–February 2000
Probable work-relatedProbable non-work-relatedAll EDISS cases (weighted estimate)
NumberNumber (%)with E codeNumber (%)of accurateE codesNumberNumber (%)with E codeNumber (%)of accurateE codesEstimated (%)with E codesEstimated (%)of accurateE codes
All injury cases993981 (98.8)634 (64.6)242236 (97.5)135 (57.2)(97.6)(57.6)
    Cause of injury documented in the medical record944932 (98.7)623 (66.8)232226 (97.4)133 (58.8)(97.5)(59.2)
    Cause of injury not documented in the medical record4949 (100.0)11 (22.4)1010 (100.0)2 (20.0)(100.0)(20.1)
    Cases determined not to be an injury77(100)0 (0.0)88 (100)0 (0.0)(100.0)(0.0)
All cases1000988 (98.8)634 (64.2)250244 (97.6)135 (55.3)(97.7)(55.7)