Assessing Bone Fracture Healing Effect of Almonds

Trauma is a leading cause of morbidity and mortality in low middle income countries with road traffic accident as a common mechanism of trauma. Femur and tibia shaft fractures are common with a burden of 5% and 20% respectively. For proper fracture healing and treatment, vitamin D supplements are prescribed in routine practice. Vitamin D can cause confusion, polyuria, thirst, anorexia, vomiting, constipation, nausea, arrhythmias, seizures, potentiate cardiac drugs, renal failure, tissue calcium deposit, bone demineralization, muscle/bone pain, allergy, weakness, metallic taste, weight loss, chest pain, dyspnea. In developing countries, most patients skip supplements due to the unaffordability, toxicity, and inaccessibility of slums. Considering the vitamin D cost and toxicity, alternative effective, safe, and affordable treatment is a prerequisite. Prunus dulcis (sweet almonds) is a dietary item which contains essential bone micronutrients that contribute in bone health for structural strength and proper functioning. evidence shows enormous health benefits of almonds According to one study, 60 grams of Prunus dulcis (almonds) reduced osteoclast formation and calcium release, indicating a positive effect on bone health. In another study, Prunus dulcis extract accelerated tibial bone fracture healing in rabbits, which is another evidence for potential benefits of Prunus dulcis on bone healing and health. In continuation to this, other health benefits are also reported. Prunus dulcis (almond) are consumed as a dietary item but it may occasionally cause allergy and if consumed in higher amount (~11 grams/day), can cause toxicity Based on the available facts, the current trial question is whether addition of Prunus dulcis (almonds) in the diet is safe, assists fracture healing, and improve vitamin D levels in blood in the femur and tibia shaft fractures compared to routine vitamin D supplement? It is hypothesized that compared to routine vitamin D3, Prunus dulcis (almonds) non-inferiorly improves fracture callus index with raise in vitamin D3 level in blood in femur and tibia shaft fracture patients.

The clinical trial aims to evaluate and compare the safety and effect of Prunus dulcis (almonds) on callus formation and callus bridging in femur and tibia shaft fractures and improvement in vitamin D level in blood up to 13 weeks compared to routine vitamin D supplements. This might assist orthopaedic surgeons in optimizing bone healing through almonds in patients arriving with fracture injuries as an alternative dietary bone nutritive source.

Primary Objectives:

1. To compare tibia and femur shaft fracture callus index (mm) and callus bridging (The Radiological Union Score for Tibial fractures-RUST) on x-rays at 4 and 13 weeks herewith group 1 suffering vitamin D insufficiency (arm A versus arm B) and group 2 suffering vitamin D deficiency (arm B versus arm C) treated as cross-over with oral 5 grams/day whole almonds and 200,000IU/week vitamin D3.
2. To compare the incidence of adverse events between almonds and vitamin D3 treatments in all trial arms up to 13 weeks follow-up.

Secondary Objectives:

1. To compare the average almonds and vitamin D3 treatment cost. 4. To compare within group blood vitamin D levels (ng/mL) at baseline and post-treatment at 4 and 13 weeks.

Methods:

Number of participants: 136 Study design: Single-center, open-labeled, crossover (1:1 for each group), non-inferiority randomized controlled trial.

Study Duration: 24 months

Study procedures:

After Institutional and Ethical Review Committee approvals, patient eligibility is assessed by the designated trained researcher in in-patient and outpatient orthopaedic units.

Consent administration process: Informed written consent (English and Urdu) administration as per Good Clinical Practice Guidelines (GCP) guidelines. Clinical trial method is explained to patients. Patients are allowed to read the consent form and ask questions. A signed consent copy is provided to each subject.

Patient Screening:

Eligibility criteria: assessment. Sampling Method: Non-probability, consecutive sampling

Randomization:

Patients (N=136) are divided into two groups. Group 1 (vitamin D insufficiency, blood vitamin D level 21-29 ng/mL) and Group 2 (vitamin D deficiency, blood vitamin D level ≤20 ng/mL). Within two weeks of screening, patients are randomly allocated into a total of three arms.

III. Group 1 (N=14):

Arm A (n=7) = 5±0.5 grams/day of whole almonds for 4 weeks, followed by 7 days washout period and initiating cross-over treatment by oral vitamin D3 200,000 units/week for 8 weeks.

Arm B (n=7) = Oral vitamin D3 200,000 units/week for 8 weeks, followed by 7 days washout period and initiating cross-over treatment by 5±0.5 grams/day of whole almonds for 4 weeks

IV. Group 2 (N=122):

Arm B (n=61) = Oral vitamin D3 200,000 units/week for 8 weeks, followed by 7 days washout period and initiating cross-over treatment by 5±0.5 grams/day of whole almonds for 4 weeks.

Arm C (n=61) = Oral vitamin D3 200,000 units/week together with 5±0.5 grams/day whole almonds for 4 weeks, followed by 7 days washout period and initiating cross-over treatment by oral vitamin D3 200,000 units/week for 8 weeks.

Patient follow-ups and Data Collection:

Patients are followed at 4 weeks±1 week and 13 weeks±1 week follow-up visits after treatment. In order to reduce bias, researchers were trained on data collection form and GCP guidelines prior to data collection. In case of lost to follow-up, patients are contacted by telephone to gather necessary information.

Assessments:

Fracture site routine X-rays and RUST score for bone fracture healing are assessed by treating surgeon/investigator(s) at follow-ups.

The research study does not seem to have any potential health hazard as vitamin D is routinely prescribed, and almonds are consumed as a dietary item. Complying with all regulatory standards and as per International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) guidelines, study subjects experiencing any adverse event (AE)/serious adverse event (SAE) will be provided optimum care at earliest. Principal Investigator is responsible for sending reports to the reporting bodies (Ethical Review Committee, Sponsor etc.) as required.

Investigational product handling: The investigational products is regularly purchased from the Purchase Department of the Hospital, weighted, packaged, and properly labelled by the designated researcher and stored at the secure dry hygienic place. The product is dispensed to the patient by the designated researcher. The daily diary is provided to the patients for compliance and investigational product intake. The returns of used packs/products are collected at follow-ups.

Data management:

Data is managed at the Department of Surgery. Randomization list is generated. Data is kept secure in cabinets with a lock and key and a password-protected system with controlled data access. Fifteen percent of the data is double-checked/validated by the Principal Investigator. Data will be archived and stored for 15 years or longer after study completion.

Statistical Consideration:

The Statistical Package for Social Sciences (SPSS) version 19.0 will be used to analyze data. Quantitative variables (age, callus index, vitamin D3 level, etc.) will be expressed as mean±SD or median (IQR) as appropriate and qualitative variables (gender, type of fracture, etc.) as frequencies (percentages). Data will be analyzed by intention to treat analysis. Investigational product related AEs/SAEs will be assessed by incidence and stratification. Per group between arms comparisons for the mean difference of callus index, RUST scores, and vitamin D3 level will be analyzed by mixed ANOVA and within arms follow-up observation by repeated measures ANOVA/Freidman test and generalized estimating equation (GEE). Femur and tibia fractures within each arm will be compared for callus index and vitamin D levels by independent student t-test/Mann Whitney U test (as appropriate). The p-value less than 0.05 will be considered statistically significant with a confidence interval of 95%. Multiple regression will be used to assess the association between covariates like age, gender, fracture type, etc., and a numeric outcome like callus index, vitamin D3 level, etc. The percentage of lost to follow-ups will also be assessed.

Withdrawals: Patients can withdraw from the study at any time without losing any of his/her patient rights.

Study Close-out:

Study close-out process will be of one to two-month duration.