Adverse outcomes in younger rib fracture patients

Recent studies on the impact of rib fractures after blunt trauma have shown a linear relationship between age, increasing number of rib fractures, and complications, including mortality. Others have documented that age-related morbidity increases before age 65 in trauma patients. We hypothesize that patients as young as age 45 demonstrate increased morbidity with injuries similar to older patients.

We performed a retrospective cohort study involving all blunt trauma patients with rib fractures, excluding those with severe head and abdominal injuries and those dying within 24 hours, admitted between January 2001 and December 2004. Outcome parameters included pulmonary complications, ICU length of stay, hospital and ICU length of stay, Injury Severity Score (ISS), number of vent days, number of rib fractures, mechanism of injury, and discharge disposition.

Of the 3,094 patients admitted, 307 met the inclusion criteria (9.9%). Based on statistical analysis of age, number of rib fractures, and adverse outcome variables, patients were separated into 4 groups: Group 1: younger than 44 years old with 1 to 4 rib fractures, Group 2: younger than 44 years with greater than 4 rib fractures, Group 3: 45 years or older with 1 to 4 rib fractures, and Group 4: 45 years or older with more than 4 rib fractures. Age groups and outcome variables were compared with chi-square, analysis of variance and multiple regression analysis. Respiratory failure, pneumonia, and associated thoracic injuries were increased in Group 4 patients compared with other groups (P < 0.05). Mortality and length of stay were not different between groups.

Patients as young as 45 with more than 4 rib fractures are at increased risk for adverse outcomes. Efforts to improve outcomes in rib fracture patients should focus not only on elderly patients, but on those as young as 45 years. Based on these data, we established a rib fracture clinical pathway focusing on patients 45 years and older with more than 4 rib fractures.