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Multifactorial Assessment of Risk of Falling in 753 Post-Menopausal Women: A Multicenter Cross-Sectional Study by the Italian Group for the Study of Metabolic Bone Diseases

Authors Iolascon G, de Sire A, Calafiore D, Benedetti MG, Cisari C, Letizia Mauro G, Migliaccio S, Nuti R, Resmini G, Gonnelli S, Moretti A

Received 14 April 2020

Accepted for publication 5 June 2020

Published 7 July 2020 Volume 2020:15 Pages 1077—1084

DOI https://doi.org/10.2147/CIA.S257304

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Richard Walker


Giovanni Iolascon,1 Alessandro de Sire,1– 3 Dario Calafiore,1,4 Maria Grazia Benedetti,5 Carlo Cisari,2,6 Giulia Letizia Mauro,7 Silvia Migliaccio,8 Ranuccio Nuti,9 Giuseppina Resmini,10 Stefano Gonnelli,9 Antimo Moretti1

1Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Naples, Italy; 2Physical and Rehabilitative Medicine, Department of Health Sciences, University of Eastern Piedmont “A. Avogadro”, Novara, Italy; 3Rehabilitation Unit, “Mons L. Novarese” Hospital, Vercelli, Moncrivello, Italy; 4Section of Neuromotor Rehabilitation, Department of Neuroscience, ASST Carlo Poma, Mantova, Italy; 5Physical Medicine and Rehabilitation Unit, IRCCS-Istituto Ortopedico Rizzoli, Bologna, Italy; 6Physical Medicine and Rehabilitation Unit, University Hospital “Maggiore della Carità”, Novara, Italy; 7Department of Surgical and Oncology Sciences, University of Palermo, Palermo, Italy; 8Department of Movement, Human and Health Sciences, Section of Health Sciences, University of Rome, Foro Italico, Rome, Italy; 9Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy; 10Section of Orthopaedics and Traumatology, Treviglio-Caravaggio Hospital, Treviglio, Bergamo, Italy

Correspondence: Alessandro de Sire
Physical and Rehabilitative Medicine, Department of Health Sciences, University of Eastern Piedmont “A. Avogadro”, Viale Piazza D’Armi 1, Novara 28100, Italy
Tel +3903213734800
Email alessandro.desire@gmail.com

Objective: To assess physical performance, number of falls, previous fragility fractures, and ongoing pharmacological therapy in a cohort of post-menopausal women, according to their risk of falling.
Methods: In this multicenter cross-sectional study, we recruited in a 3-year period (May 2016 to April 2019), women aged > 60 years referred to seven Osteoporosis and Bone Metabolism Outpatient Services of the Italian Group for the Study of Metabolic Bone Diseases. The study population was divided into three groups according to the risk of falling, assessed through the Elderly Fall Screening Test (EFST): low risk (EFST score=0– 1); moderate risk (EFST=2– 3); high risk (EFST=4– 5). Outcome measures were: 4-meter gait speed (4MGS); unipedal stance time (UST); number of falls in the previous year; previous fragility fractures; ongoing pharmacological therapy.
Results: We analyzed 753 women (mean aged 70.1± 9.2 years): 378 (50.2%) at low risk of falling, 247 (32.8%) at moderate risk, and 128 (17.0%) at high risk. 4MGS and UST resulted as pathological in the 93.9% and 99.2%, respectively, of women at high risk. There were significant differences among groups for both outcomes (p< 0.001). There was also a significant difference among groups (p< 0.001) in terms of previous falls and fragility fractures. Lastly, there were significant differences (p< 0.05) among groups in using antihypertensive drugs, antiplatelet agents, anticoagulants, antidepressants, anti-osteoporotic drugs, and vitamin D, and/or calcium supplementation.
Conclusion: Physical performance, prevalence of falls and fragility fractures, and an assessment of pharmacological therapy should be investigated in post-menopausal women because of their significant correlation with risk of falling.

Keywords: accidental falls, osteoporosis, walking speed, fractures, bone, rehabilitation

Introduction

A fall is defined by the World Health Organization as “inadvertently coming to rest on the ground, floor or other lower level.”1 Although this event occurs accidentally, several risk factors have been identified.24 Over a third of older people fall each year with unfavorable clinical consequences and a significant socio-economic burden.5 Falls, indeed, are responsible for over 13% of ambulance interventions in the emergency medical services,6 and for over 3 million hospitalizations, with a total cost exceeding 25 billion euros per year in Europe, most of which concern osteoporosis fractures.69

The assessment of fall risk in the elderly is considered as a cornerstone for the prevention of fragility fractures. There are several validated tools to provide this approach in older non-institutionalized people, such as the Performance Oriented Mobility Assessment or Tinetti Test,10 and the Timed Up and Go Test.11 In 1998, Cwikel et al proposed an easy administration and understanding test, the Elderly Fall Screening Test (EFST), to stratify the risk of falling in community-dwelling elderly.12 EFST items include both patient-reported events and functional evaluations performed by an examiner. In contrast to other assessment tools, it also takes into account two significant details, such as the number of falls and “near falls” that occurred during the previous year. “Near fall” is a stumble event or loss of balance that would result in a fall if sufficient recovery mechanisms were not activated.13 It has been recently highlighted that adults who experienced “near falls,” which are more prevalent than effective falls,14 present a greater risk of incident falls.15

Postural instability and impaired gait pattern result in an increased risk of falling and consequently fractures, and are frequently associated with sarcopenia,16 a condition commonly defined as a reduction in muscle mass combined with a decline in muscle function17 with a high prevalence not only in older people but also in the younger population, including post-menopausal women.

To date, several studies have investigated the association between physical performance and risk of falling in older women,1821 although without a wide assessment of all the impairments that characterize the aging population. Therefore, in the present study, we sought to evaluate physical performance according to the risk of falling in a cohort of community-dwelling post-menopausal women.

Methods

Participants

In this multicenter cross-sectional study, we recruited in a 3-year period (May 2016 to April 2019) community-dwelling post-menopausal women aged >60 years referred to seven Osteoporosis and Bone Metabolism Outpatient Services of the Italian Group for the Study of Metabolic Bone Diseases (Gruppo Italiano di Studio delle Malattie del Metabolismo Osseo, GISMO): University Hospital “Maggiore della Carità” in Novara, Hospital “Treviglio-Caravaggio” in Treviglio (BG), Rizzoli Orthopedic Institute in Bologna, University Hospital “Le Scotte” in Siena, University Hospital Umberto I in Rome, University Hospital “Luigi Vanvitelli” in Napoli, and University Hospital “Paolo Giaccone” in Palermo. Exclusion criteria were: a) history of neuromuscular disease; b) cognitive impairment; c) hip or knee surgery in the previous 6 months; d) recent traumas; e) need of assistance in performing activities of daily living (ADL); f) walking aids use; g) severe knee and/or hip osteoarthritis (grade IV according to the Kellgren & Lawrence classification).22

The study protocol was approved by the Institutional Review Boards and met the guidelines of the responsible governmental agency. At enrollment, all the participants were asked to carefully read and sign an informed consent, and researchers provided to protect the privacy, and the procedures in this study were in accordance with the Declaration of Helsinki, with pertinent national and international regulatory requirements. All participants were free to withdraw from the study at any time.

Outcome Measures

In the entire cohort, we assessed the risk of falling through EFST,12 consisting of 5 items with dichotomous variables (range 0–1), with a total score ranging from 0 (lower risk of falling) to 5 (higher risk of falling). The first 3 items investigate potential falls in the previous year, any traumatic lesion reported (ie, injury, abrasion, hematoma, fracture) because of falling and the frequency of “near falls.” The fourth item is a walking speed test which assesses the ability to walk over a 5-meter distance on a flat surface in 10 seconds. The last item evaluates the gait pattern, differentiating it into straight and safe or shuffling and unsteady gait. According to the EFST score, study participants have been divided into 3 groups at different risk of falling: low (EFST 0–1), moderate (EFST 2–3), or high risk (EFST 4–5).

Outcome measures of this cross-sectional study were:

  1. gait speed, evaluated by 4-meter gait speed (4MGS) with a cutoff value for poor physical performance of ≤0.8 m/s;23
  2. balance, assessed by the unipedal stance test (UST), consisting of asking the patient to maintain a static open-eyed mono-podalic position (on the dominant lower limb) with arms crossed on the chest, starting from the moment the contralateral foot was raised from the ground; the test was considered as concluded if the subject: 1) used upper limbs to support herself; 2) moved the raised limb or touched the ground with it; 3) moved the weight-bearing leg to keep the balance; 4) maintained balance over 45 seconds; this task was repeated for three times and the best time was recorded. UST score was considered as pathological if it exceeded the cutoff by gender and age, with open eyes, proposed by Springer et al;24
  3. number of falls in the previous year, stratified into 3 categories (no falls, 1 fall, or recurrent falls if ≥2);
  4. number of vertebral fragility fractures;
  5. number of hip fragility fractures;
  6. number of non-vertebral and non-hip (NVNH) fragility fractures;
  7. ongoing pharmacological therapy (corticosteroids, nonsteroidal anti-inflammatory drugs, opioids, anti-hypertensive drugs, anti-arrhythmic drugs, antiplatelet agents, anticoagulants, statins, anticonvulsants, antidepressants, immunosuppressants, chemotherapeutics, L-thyroxine, aromatase inhibitors, anti-anxiety drugs/sedative-hypnotics and other treatments), anti-osteoporotic drugs, and vitamin D and/or calcium supplementation.

Statistical Analysis

Data management and analyses were conducted according to a pre-specified statistical analytical plan. Statistical analysis was performed using STATA v.12 (StataCorp LP, College Station, TX). The continuous variables are presented as means ± standard deviations, whereas categorical data are expressed as counts (percentages). We performed the Shapiro–Wilk normality test, and because the data did not follow a normal distribution, we used Pearson’s Chi-squared test to assess differences among categorical data and the Kruskal–Wallis test to assess differences among continuous data. Moreover, the Spearman coefficient of correlation was used to test the correlation between EFST and 4MGS and UST. All the statistical tests were carried out on a two-sided significance level of 0.05.

Results

In this multicenter cross-sectional study, we included 753 women, mean aged 70.1 ± 9.2 years, with a mean body mass index of 26.6 ± 4.7 kg/m2. According to the EFST score, the study participants have been divided into 3 groups: 378 (50.2%) at low risk of falling (EFST 0–1), 247 (32.8%) at moderate risk (EFST 2–3), and 128 (17.0%) at high risk (EFST 4–5).

We found statistically significant differences in all outcome measures among the three groups (see Table 1 for further details). A reduced 4MGS (≤0.8 m/s) was found in 40.2% of women with EFST 0–1, in 69.6% of women at moderate risk of falling, and in 93.9% of women at high risk of falling, with a significant difference among groups (p<0.001). According to the cutoffs by gender and age, UST resulted as pathological in 76.7% of women at low risk of falling, in 90.7% of women at moderate risk, and in almost all (99.2%) women at high risk, with a statistically significant difference among groups (p<0.001). There were also significant differences among groups (p<0.001) in the number of vertebral, hip, and NVNH fragility fractures, with a higher prevalence in the group at high risk of falling (as shown in Table 1).

Table 1 Differences in Outcome Measures Among Groups in the Study Population (n=753)

Furthermore, significant moderate negative correlations were observed for both comparisons between EFST and gait speed (ρ = −0.575; p<0.001) and between EFST and UST (ρ = −0.527; p<0.001).

In the study population, 667 patients (88.6%) were receiving pharmacological therapies, as shown in Table 2. According to the EFST score, there were statistically significant differences among groups in terms of anti-hypertensive drugs (p<0.001), antiplatelet agents (p=0.002), anticoagulants (p<0.001), and antidepressants (p=0.017). Lastly, we reported that the post-menopausal women at high risk of falling (EFST 4–5) showed a significantly higher consumption of anti-osteoporotic drugs, and vitamin D and/or calcium supplementation than the other groups (p=0.001).

Table 2 Differences in Pharmacological Therapies Among Groups in Patients Undergoing Any Treatment (n=667)

Discussion

The results of this multicenter cross-sectional study suggest that community-dwelling post-menopausal women at high risk of falling have the worst physical performance in terms of gait speed and balance.

These findings are in line with those reported in other studies in the literature.2527 Shimada et al showed that fallers had significantly lower gait speed compared to non-fallers, suggesting that a slow gait was associated with an increased risk of falls.25 Moreover, it has been demonstrated that poor physical performance has good accuracy for predicting falls and consequent hospitalization.26,27

In our population, the history of falls in patients with EFST high score was more prevalent than in the other two groups. Furthermore, it should be highlighted the high prevalence of fragility fractures (vertebral, hip, and NVNH) in women at high risk of falling. In particular, in this group, more than half of patients had at least one vertebral fragility fracture.

Our data suggest that the higher the risk of falling, the worse were gait speed and balance in post-menopausal women, as demonstrated by the moderate correlation between EFST score and both gait speed and UST. Taking into account that major risk factors for falls are identified as impairments of balance and gait, polypharmacy, history of falls and “near falls,” EFST might be considered as a reliable tool to detect individuals at high risk of falling; our data support its role in this context, also considering that it is easy to use and quick to perform.

It might be easily hypothesized that a worse physical performance is a determining factor for falls and consequent fragility fractures. All strategies aimed at improving physical performance might significantly prevent the occurrence of these disabling conditions. In our sample, as we could expect, the women at higher risk of falling had a significantly higher number of osteoporotic fractures and a worse physical performance. Taken together, these findings confirm that osteoporosis and muscle wasting could go hand-in-hand in the elderly.28 The concept of “osteosarcopenia” describes a subset of older persons affected by a combination of low bone density (osteopenia/osteoporosis) and low muscle mass, strength, and/or functional capacity (sarcopenia).2931 To manage this pathological condition, it is mandatory to diagnose it through adequate assessment of muscle function, particularly measuring gait speed.31 Moreover, Bhasin et al32 have recently shown that low gait speed might independently predict falls in community-dwelling older adults. Our study also confirms the role of this outcome measure as a quick, safe, and highly reliable test for physical performance.33 It has been demonstrated that gait speed might predict several adverse outcomes, such as falls, disability, need for institutionalization, and mortality.3436

From our data analysis, it is not surprising that women at high risk of falling consumed more anti-hypertensive drugs (p<0.001), antiplatelet agents (p=0.002), anticoagulants (p<0.001), and antidepressants (p=0.017) than the others. These findings are intriguing and might lead to several considerations on the relationship between polypharmacotherapy and risk of falling. Moreover, we can confirm that our results are in line with a recent longitudinal study performed by Dhalwani et al37 that showed that almost one-third of the population using five or more drugs had a significantly higher rate of falls over a 2-year period. It should be underlined that in our cohort, the 12.9% of women at high risk of falling were taking antidepressants, which are considered as the psychotropic drugs most strongly related to fall injuries.38 However, the link between drugs associated with increased risk of falling and any of the parameters of physical performance, such as gait speed and balance, deserves to be further investigated in future studies.

Lastly, we reported that the post-menopausal women at high fall risk (EFST 4–5) were receiving more anti-osteoporotic drugs, vitamin D, and/or calcium supplementation than the other groups (p=0.001), presumably due to the higher percentage of fragility fractures. Our study group has previously demonstrated the correlation between vitamin D deficiency and poor muscle function,21,3941 but it is still debated if vitamin D supplementation could reduce the percentage of fallers.42 Further prospective studies are required to better elucidate the role of vitamin D in this context.

There is no doubt that the prevention of falls is better and more cost-effective than trying to address their consequences, such as fragility fractures.7,43 Therefore, starting from an accurate definition of key risk factors, rehabilitation might have a main role in the prevention of falls. According to this management strategy, the Centers for Disease Control and Prevention (CDC)44 have recently developed an algorithm to provide a multifactorial intervention for the elderly, according to specific risk factors and the number of falls. Moreover, the National Institute for Health and Care Excellence Guidelines45 recommended strengthening and balance training exercises for the elderly, considering that these interventions have been shown to significantly reduce the rate of falls. Indeed, in older people, particularly those with a history of previous fragility fractures, it is mandatory to implement an adequate individual rehabilitation project, including therapeutic exercise (early mobilization, structured exercise programs, strengthening, and balance training) for improving functional recovery and reducing the risk of falls and other fractures.46 Therapeutic exercise interventions have highly site-specific effects on bone tissue, and mainly forceful, rapid movements that load bones from many directions are known as the most beneficial;47 indeed, repetitive movements or low-impact exercises achievable in the elderly might prevent new incident fragility fractures.47

Even if it is difficult to perform a high-impact activity in older people because of their limited physical capacity or their comorbidities, the Position Paper of the Italian Society of Orthopaedics and Medicine49 has clearly defined specific treatment strategies for sarcopenic older people to perform safe, feasible, and effective aerobic, resistance, and power training exercises.

Moreover, it is also strongly recommended to treat age-related muscle loss through the prescription of resistance-based physical activity, and conditionally recommended an adequate protein supplementation.5059 Indeed,the role of a protein-rich diet and adequate use of dietary supplements in post-menopausal women and generally in older people has to be highlighted.5155 A combination of physical exercise and amino acid supplementation might prevent or contrast muscle wasting in the elderly, as already shown by several studies.5659

Study Limitations

This study has some limitations that have to be mentioned: firstly, the cross-sectional design of the study prevents a causal relationship from being established between low physical performance and falling rate; secondly, lack of data on muscle strength, a parameter that might be useful to better define fall risk in our cohort; thirdly, absence of data on the level of physical activity and on the nutritional assessment in our cohort (dietary intake, amino acid supplementation, use of dietary supplements, etc.); lastly, the absence of biochemical assessment of bone metabolism.

Conclusion

The findings of this multicenter cross-sectional study suggested that community-dwelling post-menopausal women at high risk of falling had worse physical performance, a higher prevalence of previous falls and osteoporotic fractures, and consumed more drugs. Therefore, it is mandatory to promote the prevention of falls in older people by developing a specific multidisciplinary community program. Outcome measures addressing physical function should be routinely provided in both primary care and rehabilitation settings in order to assess the risk of falling and to provide a patient-tailored multifactorial treatment.

Disclosure

The authors report no conflicts of interest in this work.

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