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Protein Supplements Increase Serum Insulin-Like Growth Factor-I Levels and Attenuate Proximal Femur Bone Loss in Patients with Recent Hip Fracture: A Randomized, Double-Blind, Placebo-Controlled Trial
Abstract
BACKGROUND: Elderly persons who have osteoporotic hip fracture are often undernourished, particularly with respect to protein. Protein malnutrition may contribute to the occurrence and outcome of hip fracture. OBJECTIVE: To investigate whether oral protein supplements benefit bone metabolism in patients with recent hip fracture. DESIGN: 6-month, randomized, double-blind, placebo-controlled trial with a 6-month post-treatment follow-up. SETTING: University orthopedic ward. PATIENTS: 82 patients (mean age, 80.7 +/- 7.4 years) with recent osteoporotic hip fracture. Patients received calcium supplementation, 550 mg/d, and one dose of vitamin D, 200,000 IU (at baseline). INTERVENTION: Protein supplementation, 20 g/d, or isocaloric placebo (among controls). MEASUREMENTS: Bone mineral density, biochemical markers of bone remodeling, calciotropic hormone levels, biochemically evaluated nutritional and immunologic status, and muscle strength were measured every 6 months. RESULTS: Compared with controls, patients who received protein supplements had significantly greater increases in serum levels of insulin-like growth factor-I (85.6% +/- 14.8% and 34.1% +/- 7.2% at 6 months; difference, 51.5 percentage points [95% CI, 18.6 to 84.4 percentage points]; P = 0.003) and an attenuation of the decrease in proximal femur bone mineral density (-2.29% +/- 0.75% and -4.71% +/- 0.77% at 12 months; difference, 2.42 percentage points [CI, 0.26 to 4.59 percentage points]; P = 0.029). Seven and 13 new vertebral deformities were found among patients who received protein supplements and controls, respectively (P > 0.2). Median stay in rehabilitation wards was shorter for patients who received protein supplements than for controls (33 days [CI, 29 to 56 days] and 54 days [CI, 44 to 62 days]; difference, 21 days [CI, 4 to 25 days]; P = 0.018). CONCLUSION: Protein repletion after hip fracture was associated with increased serum levels of insulin-like growth factor-I, attenuation of proximal femur bone loss, and shorter stay in rehabilitation hospitals.
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“Considerable evidence supports the concept that supplemental protein or higher dietary protein intake by older people hospitalized for hip fracture could reduce risk for complications, 74,84,85 improve bone mineral density, 86,87 and reduce rehabilitation time (Table 4).86”
From Evidence-Based Recommendations for Optimal Dietary Protein Intake in Older People: A Position Paper From the PROT-AGE Study Group (2013) · cites this paper as [86]
In the citing paper
“Schurch 1998 86 20 g extra/d RCT with 82 patients with recent hip fracture, 20 g proteins day for 6 months increased IGF-1, decreased loss of BMD and reduced hospital stay.”
From Evidence-Based Recommendations for Optimal Dietary Protein Intake in Older People: A Position Paper From the PROT-AGE Study Group (2013) · cites this paper as Schurch 1998
In the citing paper
“Of 7 RCTs exploring modifications of ADLs, most found no significant differences between high-protein ONS groups and controls, whereas one trial found improvement for people in the ONS group.86,230”
From Evidence-Based Recommendations for Optimal Dietary Protein Intake in Older People: A Position Paper From the PROT-AGE Study Group (2013) · cites this paper as [86]
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Metadata
- Authors
- Schurch, M.-A., Rizzoli, R., Slosman, D., Vadas, L., Vergnaud, P., & Bonjour, J.-P.
- Affiliations
- For author affiliations and current author addresses, see end of text.
- Venue
- Annals of Internal Medicine
- Publisher
- American College of Physicians
- Published
- 1998-05-15
- Volume
- 128
- Issue
- 10
- Pages
- 801-809
- ISSN
- 0003-4819 (ISSN-L)
- 1539-3704
- OpenAlex
- W2082655867
- Cited by
- 572
- References
- 1
- Citations by year
- 2026: 5 · 2025: 4 · 2024: 7 · 2023: 13 · 2022: 12 · 2021: 17 · 2020: 10 · 2019: 17 · 2018: 27 · 2017: 15 · 2016: 20 · 2015: 16 · 2014: 33 · 2013: 24 · 2012: 20
- FWCI
- 19.05
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Annals of Internal Medicine (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
- Health Sciences › Medicine › Physiology (medical) › Nutrition and Health in Aging
- Health Sciences › Medicine › Surgery › Hip and Femur Fractures
- Keywords
- protein supplementation, osteoporotic hip fracture, insulin-like growth factor I, bone loss, protein malnutrition, older adults, bone metabolism, vertebral deformity, rehabilitation length of stay, calcium and vitamin D supplementation, muscle strength, nutritional status, bone turnover markers, fracture healing, protein repletion, fracture rehabilitation
- MeSH terms
- Activities of Daily Living, Aged, Aged, 80 and over, Dietary Proteins, Double-Blind Method, Female, Femur, Follow-Up Studies, Hip Fractures, Humans, Immunoglobulin M, Insulin-Like Growth Factor I, Length of Stay, Male, Osteoporosis, Placebos, Prealbumin, Protein Deficiency, Serum Albumin, Bone Density, Dietary Supplements
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