Impact of body mass index on outcomes of inpatients with vertebral compression fractures in Japan: A retrospective cohort study

Abstract

AimThe present study examined the relationship between body mass index and the ability to perform the activities of daily living in patients with vertebral compression fractures.MethodsA retrospective cohort analysis of patients aged >65 years hospitalized with a vertebral compression fracture was carried out using a nationwide database in Japan. Body mass index was categorized as underweight (<18.5 kg/m2), normal weight (18.5–22.9 kg/m2), overweight (23.0–27.4 kg/m2) and obese (≥27.5 kg/m2) according to the World Health Organization criteria for the Asia–Pacific region. The primary outcome was Barthel Index gain, namely, the change in the Barthel Index score at discharge from that at admission. Secondary outcomes were the length of hospital stay and readmission within 30 days of discharge.ResultsAmong 41 423 participants, 24.5% were classified as underweight, excluding those with missing body mass index data. The underweight group had a significantly lower Barthel Index gain than the normal, overweight and obese groups (median 20 vs 25 vs 30 vs 30, respectively, P < 0.001). The underweight group also had longer hospital stays and higher 30‐day readmission rates than the other groups. A multivariable analysis showed that being underweight was independently associated with a Barthel Index gain −3.63 points (95% confidence interval −4.58 to −2.68) lower than normal weight. Furthermore, being underweight was an independent variable affecting the length of hospital stay and readmission within 30 days (P < 0.001).ConclusionsIn patients with vertebral compression fractures, being underweight leads to lower Barthel Index scores, longer hospital stays and increased readmissions within 30 days of discharge. Geriatr Gerontol Int 2023; ••: ••–••.

Correlations between Sagittal Parameters and Functional Scores in 65-Year-Old Osteoporotic Females with Vertebral Body Fracture under Low-Energy Mechanism

“…Notably, when stratifying the participants under different conditions, such as age (≤72 versus >72 years) and obesity status (nonobese versus obese), the significance of these findings persisted within all subgroups. However, previous research has suggested an association between being underweight in patients with VCF and a reduced ability to perform ADLs, indicating a poorer prognosis [16]. These findings suggest that individuals with a greater thoracolumbar kyphotic angle tend to exhibit less satisfactory functional performance and experience more pain following a VCF.…”

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