Slaviša G. Zagorac

Enhanced trabecular micro-architecture of the femoral neck in hip osteoarthritis vs. healthy controls: a micro-computer tomography study in postmenopausal women

PurposeA controversial relationship between osteoarthritis (OA) and bone fragility has been attracting considerable attention. However, despite interest in the effects of OA on femoral neck fracture risk and numerous studies analysing the changes in the arthritic femoral head, there is insufficient data about femoral neck 3D bone micro-architecture in individuals with hip osteoarthritis. We compared trabecular micro-architecture of the femoral neck between postmenopausal women with coxarthrosis and controls to explore whether coxarthrosis may indicate reduced bone fragility from the trabecular micro-architectural perspective.MethodsThe study sample included nine women with hip osteoarthritis and 13 age-matched controls. The femoral neck sections were scanned using micro-computed tomography, evaluating the cancellous bone from the superolateral and inferomedial neck subregions.ResultsOsteoarthritic subjects demonstrated a general trend of improved trabecular micro-architecture in both analysed subregions when compared with age-matched controls. In particular, several architectural properties that are important predictors of cancellous bone strength showed significantly better values in the OA group, even after adjusting for bone volume fraction. Namely, the OA group expressed higher trabecular connectivity (p = 0.008), lower SMI indicating more plate-like structure (p = 0.005), and reduced anisotropy (p = 0.006) particularly in the inferomedial neck. Osteoarthritic cases also trended towards higher BV/TV, particularly in the superolateral neck. All micro-architectural parameters displayed significant regional heterogeneity (p ≤ 0.01), with the inferomedial neck region showing more favourable values than the superolateral region.ConclusionsEnhanced trabecular micro-architecture of the femoral neck in postmenopausal osteoarthritic subjects suggests reduced cancellous bone fragility in comparison with their age-matched healthy controls.

Severe road traffic injuries and youth: a 4-year analysis for the city of Belgrade

The objective of this study is to describe severe road traffic injuries (RTIs) in the population under 18 years in Belgrade, the capital of Serbia. We analysed both severe non-fatal and fatal RTIs in children and adolescents under 18 years old in the Belgrade area, during the period 2008–2011. Data sources were the official statistics of the Public Health Institute in Belgrade and forensic-medical records from two paediatric university hospitals and five university hospitals for adults. Using descriptive statistical methods, demographic characteristics, mechanism, type and time of injuries, surgical treatment procedures, injury severity scores (ISS), length of stay and outcome were evaluated. The admission and mortality rates were calculated. Among the total of 379 injured, 256 (67.5%) were male; the average age was 13.0 ± 4.7 (range: 0–18 years). The annual hospital admission rate of RTIs for both sexes decreased in average by 12.6% (95% CI = 9.3%–15.9%). The mean percentage of annual changes of mortality rates was 2.0 %; 95% CI = 1.3%–5.3% (5.7 per 100,000 in 2008, 5.6 in 2009, 4.7 in 2010 and 5.9 in 2011). The highest admission rates and mortality rates were for pedestrians, followed by passengers and cyclists. Accidents occurred most commonly on Monday (18.7%). Among children hospitalised for traffic injuries, 57.8% had head and neck trauma, 30.6% extremity fractures, 5% abdominal injuries, 4.2% chest and 2.4% multiple injuries. The average ISS was 22.4 (SD = 20.4), ranging from 1 to 75. Alcohol in blood was confirmed in 7.4% males and 3.3% females (p > 0.05). The average time of hospital stay was 8.8 days (SD = 16.7), ranging from 1 to 14. The increased rates require implementation of a well-defined national strategy in our country.