Use of ICD-9-CM codes in the estimation of alcohol-involved injury: search for a surrogate II.
This study presents a follow-up analysis of 22,427 injury cases drawn from the California Regional Trauma Registry. Whereas the earlier analysis developed a surrogate for alcohol-involved injuries using E-codes as reflective of injury type, this analysis explores the possibility of using ICD-9-CM diagnosis codes that have a longer history and are available in more jurisdictions. Findings reported herein indicate that the original demographic patterns predicting testing and alcohol involvement patterns were maintained in ICD-9-CM diagnostic code-based models. Moreover, although variables representing demographic background, time of day, and day of week clearly were the most powerful model predictors, ICD-9-CM diagnostic codes reflecting physician assessment that the patient had a chronic alcohol problem did improve the fit of models, and thus provide additional information concerning testing and blood alcohol concentration patterns. In contrast, ICD-9-CM diagnostic codes reflecting the specific nature of the injury, although statistically significant, explained little additional variability in alcohol involvement. Nevertheless, the overall model did accurately classify approximately 75% of those in the sample for whom blood alcohol concentration status information was available, suggesting its appropriateness for surrogate development.
Treno
A J
AJ
Prevention Research Center, Berkeley, California 94704, USA.
Gruenewald
P J
PJ
Ponicki
W R
WR
D000293:Adolescent; D000328:Adult; D000368:Aged; D000437:Alcoholism / Q000145:classification / Q000175:diagnosis* / Q000453:epidemiology; D002140:California / Q000453:epidemiology; D000431:Ethanol / Q000493:pharmacokinetics*; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D008297:Male; D008875:Middle Aged; D010348:Patient Care Team; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D012042:Registries / Q000706:statistics & numerical data; D012307:Risk Factors; D014947:Wounds and Injuries / Q000097:blood / Q000145:classification / Q000453:epidemiology*
D000431:Ethanol