 Association between the Osteoporosis Self-Assessment Tool for Asians Score and Mortality in Patients with Isolated Moderate and Severe Traumatic Brain Injury: A Propensity Score-Matched AnalysisCheng-Shyuan Rau,
Pao-Jen Kuo,
Shao-Chun Wu,
Yi-Chun Chen,
Hsiao-Yun Hsieh and
Ching-Hua Hsieh
IJERPH, 2016, vol. 13, issue 12, 1-14 Abstract: Background: The purpose of this study was to use a propensity score-matched analysis to investigate the association between the Osteoporosis Self-Assessment Tool for Asians (OSTA) scores and clinical outcomes of patients with isolated moderate and severe traumatic brain injury (TBI). Methods: The study population comprised 7855 patients aged ?40 years who were hospitalized for treatment of isolated moderate and severe TBI (an Abbreviated Injury Scale (AIS) ?3 points only in the head and not in other regions of the body) between 1 January 2009 and 31 December 2014. Patients were categorized as high-risk (OSTA score < ?4; n = 849), medium-risk (?4 ? OSTA score ? ?1; n = 1647), or low-risk (OSTA score > ?1; n = 5359). Two-sided Pearson’s chi-squared, or Fisher’s exact tests were used to compare categorical data. Unpaired Student’s t -test and Mann-Whitney U test were performed to analyze normally and non-normally distributed continuous data, respectively. Propensity score-matching in a 1:1 ratio was performed using NCSS software, with adjustment for covariates. Results: Compared to low-risk patients, high- and medium-risk patients were significantly older and injured more severely. The high- and medium-risk patients had significantly higher mortality rates, longer hospital length of stay, and a higher proportion of admission to the intensive care unit than low-risk patients. Analysis of propensity score-matched patients with adjusted covariates, including gender, co-morbidity, blood alcohol concentration level, Glasgow Coma Scale score, and Injury Severity Score revealed that high- and medium-risk patients still had a 2.4-fold (odds ratio (OR), 2.4; 95% confidence interval (CI), 1.39–4.15; p = 0.001) and 1.8-fold (OR, 1.8; 95% CI, 1.19–2.86; p = 0.005) higher mortality, respectively, than low-risk patients. However, further addition of age as a covariate for the propensity score-matching demonstrated that there was no significant difference between high-risk and low-risk patients or between medium-risk and low-risk patients, implying that older age may contribute to the significantly higher mortality associated with a lower OSTA score. Conclusions: Older age may be able to explain the association of lower OSTA score and higher mortality rates in patients with isolated moderate and severe TBI. Keywords: Osteoporosis Self-Assessment Tool for Asians (OSTA); mortality; traumatic brain injury (TBI); injury severity score (ISS); osteoporosis (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:13:y:2016:i:12:p:1203-:d:84377 Access Statistics for this article IJERPH is currently edited by Ms. Jenna Liu More articles in IJERPH from MDPI |
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