Inter- and intraobserver reliability assessment of the 2018 AO/OTA classification for high-energy pelvic ring injuries: A retrospective study.

BACKGROUND: A fracture classification system should be a reliable and reproducible means of communication between different observers. It should be logical, comprehensible, and shouldn't contain an unmanageable number of categories. The aim of this study was to assess the intra- and interobserver agreement and reliability of the revised 2018 AO/OTA classification for high-energy pelvic ring injuries (PRI), at the level of the types, groups, subgroups and qualifications. HYPOTHESIS: Agreement and reliability of the revised 2018 AO/OTA classification for high-energy PRI are improved when compared to previous versions of the classification. PATIENTS AND METHODS: Plain radiographs and computed tomography images of a consecutive series of 86 adult patients admitted at a level I trauma center with a high-energy PRI between 01.01.2014 and 31.12.2016 were retrospectively analyzed. Three orthopedic surgeons independently classified these PRI using the 2018 AO/OTA and the Young and Burgess classifications. The senior surgeon analyzed all injuries twice, at 6 months interval, to determine intraobserver reliability. Classification agreement was assessed using percent agreement and classification reliability was assessed using kappa coefficients. RESULTS: For the intraobserver analysis, injury classifications with the 2018 AO/OTA classification were concordant in 88% of cases (type), 74% (group), 66% (subgroup) and 49% (qualification). Respective kappa coefficients were 0.79, 0.68, 0.62 and 0.47. Interobserver agreement declined from 77% (type) to 42% (group), 36% (subgroup) and 24% (qualification). Respective kappa coefficients were 0.72, 0.48, 0.48 and 0.37. Intraobserver (respectively interobserver) percent agreement with the Young and Burgess classification was 76% (50%) and kappa coefficient was 0.69 (0.51). DISCUSSION: The 2018 AO/OTA classification is a reliable tool for daily clinical use and for research purpose at the fracture type level but not at the group, subgroup and qualification levels. These results compare favorably with previously published data for older versions of the classification and may represent an improvement of the AO/OTA classification system in terms of reliability. LEVEL OF EVIDENCE: III; retrospective diagnostic study.

Conditions found among pediatric survivors during the early response to natural disaster: a prospective case study.

BACKGROUND: Major natural disasters may provoke a mass casualty situation, and children tend to represent an important proportion of the victims. The purpose of this study was to prospectively record medical conditions presented by pediatric survivors of a major natural disaster to determine the type of medical specialists most needed during the acute phase of relief response. METHODS: After the 2010 Haiti earthquake, age, sex, date of presentation, diagnosis, and treatment provided were prospectively recorded for all patients less than 18 years old treated by a medical relief team. Patients were then allocated to 1 of the 2 groups: surgical (traumatism or surgical disorder) and medical (medical disorder). Medical activity lasted for 43 days. RESULTS: Four hundred seventy-one of the 796 treated patients were less than 18 years old. Two hundred forty-four (52%) were assigned to the surgical group and 227 (48%) to the medical group. As there was a substantial decrease in the number of new surgical patients registered on day 11 of activity, we arbitrarily defined an early period (until day 10 of activity) and a late period (beginning on day 11 of activity). Data obtained from the 147 new patients registered during the early period revealed 134 (91%) surgical patients and 13 (9%) medical patients. Eighty-eight percent of patients needed specialized care for traumatic orthopaedic lesions, and procedures under anesthesia or sedation were mainly (98%) performed for traumatic conditions. Data obtained for the 324 new patients registered during the late period revealed 110 (34%) surgical patients and 214 (66%) medical patients. There was a switch from high surgical needs to more routine medical and surgical care, with less procedures (88%) for the treatment of traumatic lesions. CONCLUSIONS: Pediatric orthopaedic surgeons have a major role to play in the acute phase of relief response to potentially minimize long-term physical and psychosocial disability associated with these complex injuries in growing patients. LEVEL OF EVIDENCE: Economic or decision analyses, level II.