Trauma Severity and Not the Socio-Economic Variables Determine Survival after Penetrating Trauma in a Medium-Income Country

RESULTS: We assigned 278 unique diagnosis codes and 98 unique procedure codes to admissions during the study period. One hundred twenty-seven diagnosis codes represented 80% of diagnoses, and 42 procedure codes represented 80% of procedures. A maximum of 3 diagnoses and 3 procedure codes was sufficient to describe each admission and each procedure, respectively. Seventy-seven diagnoses and 44 procedure codes were added for pragmatic completeness (eg, bilateral vs unilateral versions of codes, additional anatomic sites). The final code lists consisted of 355 diagnoses and 142 procedure codes.